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<s> Chọn đáp án đúng với câu hỏi: Mark the letter A, B, C or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.
A. decrease
B. develop
C. rent
D. racket Đáp án là: C. rent </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Những nét đặc sắc về nội dung của bài thơ trên là gì?
A. Tình mẫu tử thiêng liêng và triết lí sâu sắc về tình yêu cuộc sống
B. Tái hiện bức tranh cuộc sống sinh động, chân thực
C. Thể hiện ước mơ tự do, bay bổng, lãng mạn
D. Tái hiện bức tranh thiên nhiên đẹp, mơ mộng, kì ảo Đáp án là: A. Tình mẫu tử thiêng liêng và triết lí sâu sắc về tình yêu cuộc sống </s> | [
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<s> Chọn đáp án đúng với câu hỏi: The taxi_______ up by the kerb.
A. drew
B. stopped
C. came
D. turned Đáp án là: A. drew </s> | [
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<s> Chọn đáp án đúng với câu hỏi: I have a ____ on a classmate who is very near and dear to me.
A. crush
B. desire
C. flame
D. passion Đáp án là: A. crush </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Có 6 dung dịch đựng trong 6 lọ: NH 4 Cl; (NH 4 ) 2 SO 4 ; MgCl 2 ; AlCl 3 ; FeCl 2 ; FeCl 3. Chỉ dùng một hóa chất nào sau đây có thể giúp nhận biết chúng?
A. Na dư
B. dung dịch NaOH dư
C. Ba dư
D. dung dịch AgNO 3 Đáp án là: C. Ba dư </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một con lắc lò xo gồm lò xo có độ cứng 40 N/m và vật nhỏ có khối lượng m. Tác dụng lên vật ngoại lực F = 5cos10t (N) (t tính bằng s) dọc theo trục lò xo thì xảy ra hiện tượng cộng hưởng. Lấy π 2 = 10. Giá trị của m bằng
A. 100 g.
B. 4 kg.
C. 0,4 kg.
D. 250 g. Đáp án là: C. 0,4 kg. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: These books weren’t really intriguing, _______?
A. weren’t there
B. were they
C. weren’t they
D. were there Đáp án là: B. were they </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Tại mặt thoáng của một chất lỏng có hai nguồn phát sóng kết hợp A và B cách nhau 8 cm. Cho A, B dao động điều hòa, cùng pha, theo phương vuông góc với mặt chất lỏng. Bước sóng của sóng trên mặt chất lỏng là 1 cm. Gọi M, N là hai điểm thuộc mặt chất lỏng sao cho MN = 4 cm và AMNB là hình thang cân. Để trên đoạn MN có đúng 5 điểm dao động với biên độ cực đại thì diện tích lớn nhất của hình thang có thể là:
A. 18 5 cm 2.
B. 9 3 cm 2.
C. 9 5 cm 2.
D. 18 3 cm 2. Đáp án là: A. 18 5 cm 2. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Ở ruồi giấm, tính trạng màu mắt do 1 gen có 2 alen nằm trên nhiễm sắc thể giới tính X vùng không tương đồng trên Y quy định, alen A quy định mắt đỏ trội hoàn toàn so với alen a quy định mắt trắng. Cho các con đực mắt đỏ lai với các con cái mắt đỏ (P), thu được F 1 có tỉ lệ kiểu hình gồm 11 con mắt đỏ : 1 con mắt trắng. Cho các con F 1 giao phối ngẫu nhiên thu được F 2. Biết rằng không có đột biến xảy ra, kiểu hình mắt trắng ở F 2 chiếm tỉ lệ
A. 16/144
B. 1/24
C. 7/144
D. 1/144 Đáp án là: C. 7/144 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: It can be inferred from the passage that, in summer, ________.
A. there is not a great temperature differential between higher and lower altitudes
B. the greater temperature differential between higher and lower altitudes makes thunderstorms more likely to occur
C. there is not much cold air higher up in the atmosphere
D. the temperature of rising air drops more slowly than it does in winter Đáp án là: B. the greater temperature differential between higher and lower altitudes makes thunderstorms more likely to occur </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.
A. C u lture
B. st u dent
C. instit u tion
D. u niversity Đáp án là: A. C u lture </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Trước ngày 6-3-1946, Đảng, Chính phủ và Chủ tịch Hồ Chí Minh thực hiện sách lược
A. hòa với Trung Hoa Dân quốc để đánh Pháp.
B. hòa với Pháp đê đuổi quân Trung Hoa dân quốc.
C. hòa với Pháp và Trung Hoa Dân quốc để chuẩn bị lực lượng.
D. câu A và B đúng. Đáp án là: A. hòa với Trung Hoa Dân quốc để đánh Pháp. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Đoạn mạch xoay chiều có cường độ dòng điện trong mạch biến thiên theo thời gian i = I 0 cos ω t + π 6, khi đặt vào hai đầu đoạn mạch một điện áp u = U 0 cos ω t + π 2. Công suất của đoạn mạch này bằng:
A. U 0 I 0 4
B. U 0 I 0
C. U 0 I 0 2
D. U 0 I 0 2 Đáp án là: A. U 0 I 0 4 </s> | [
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Giá trị lớn nhất của hàm số f(x)=x^2e^xtrên đoạn [-1;1]là
A. e
B. 1/(e)
C. 2e
D. 0 Đáp án là: A. e </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Ecđixơn có tác dụng:
A. Gây ức chế sự lột xác của sâu bướm, kích thích sâu biến thành nhộng và bướm
B. Gây ức chế sự lột xác của sâu bướm, kìm hãm sâu biến thành nhộng và bướm.
C. Gây lột xác của sâu bướm, kích thích sâu biến thành nhộng và bướm.
D. Gây lột xác của sâu bướm, ức chế sâu biến thành nhộng và bướm Đáp án là: D. Gây lột xác của sâu bướm, ức chế sâu biến thành nhộng và bướm </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Thực hiện sơ đồ phản ứng sau (đúng với tỉ lệ mol các chất) (1) X + 2NaOH → t o X 1 + X 2 + 2H 2 O (2) mX 2 + mX 5 → t o, xt Tơ nilon-6,6 + 2mH 2 O (3) X 1 + H 2 SO 4 → X 3 + Na 2 SO 4 (4) X 3 + X 4 → H +, t o X 6 + 2H 2 O (5) nX 3 + nX 4 → xt, t o Tơ lapsan + 2nH 2 O (6) X 5 + X 4 → H +, t o X 7 + H 2 O Nhận định sai là
A. Tổng số liên kết pi trong phân tử X 6 bằng 6.
B. Tổng số nguyên tử hiđro trong hai phân tử X 6 và X 7 là 22.
C. Trong phân tử X 7 chứa nhóm hiđroxyl − OH).
D. Chất X có tính lưỡng tính. Đáp án là: A. Tổng số liên kết pi trong phân tử X 6 bằng 6. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Đên giữa những năm 70 của thế kỉ XX, các quốc gia nào ở châu Phi được đánh giá là điển hình của phong trào giải phóng dân tộc ở châu lục này?
A. Angiêri, Tuynidi, Marốc.
B. Nam Phi, Tuynidi.
C. Môdămbích, Ănggôla.
D. Côngô, Ănggôla. Đáp án là: C. Môdămbích, Ănggôla. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Ngoài những quặng sắt và chất trợ dung, quy trình công nghệ luyện thép còn cần những chất cơ bản như:
A. Than cốc-đá vôi.
B. Lưu huỳnh-than cố c.
C. Đá vôi-nước.
D. Than cốc-nước Đáp án là: A. Than cốc-đá vôi. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Trong các kim loại: Al, Cu, Fe và Ag. Kim loại có tính dẫn điện cao nhất là
A. Cu
B. Fe
C. Ag
D. Al Đáp án là: C. Ag </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Thực hiện thí nghiệm giao thoa ánh sáng Y-âng với đồng thời hai bức xạ đơn sắc có bước sóng λ 1 = 0,6 μm và λ 2. Khoảng cách hai khe là a = 0,2 mm, khoảng cách từ mặt phẳng chứa hai khe đến màn là D = 1 m. Cho biết trong bề rộng của vùng giao thoa trên màn bằng 24 mm có tất cả 17 vạch sáng trong đó có 3 vạch là kết quả trùng nhau của hai hệ vân. Tìm λ 2, biết hai trong ba vạch trùng nhau nằm ngoài cùng của vùng giao thoa.
A. 540 nm
B. 760 nm
C. 420 nm
D. 480 nm Đáp án là: D. 480 nm </s> | [
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<s> Chọn đáp án đúng với câu hỏi: When she decided to give up Facebook_____.
A. her friends didn’t care much
B. she found it too difficult to continue
C. she found it too difficult to continue
D. she couldn’t focus on her homework Đáp án là: C. she found it too difficult to continue </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Tìm số tự nhiên n biết 1 + 2 + 3 +... + n = 465.
A.27
B.28
C.29
D.30 Đáp án là: D.30 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Môi trường sống là nơi sinh sống của sinh vật, bao gồm tất cả các nhân tố sinh thái
A. vô sinh và hữu sinh ảnh hưởng trực tiếp đến đời sống của sinh vật
B. hữu sinh ảnh hưởng trực tiếp đến đời sống của sinh vật
C. vô sinh và hữu sinh ảnh hưởng trực tiếp hoặc gián tiếp đến đời sống của sinh vật
D. hữu sinh ảnh hưởng trực tiếp hoặc gián tiếp đén đời sống của sinh vật Đáp án là: C. vô sinh và hữu sinh ảnh hưởng trực tiếp hoặc gián tiếp đến đời sống của sinh vật </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Hợp chất hữu cơ X (chứa C, H, O) chỉ có một loại nhóm chức. Cho 0,15 mol X phản ứng vừa đủ với 180 gam dung dịch NaOH, thu được dung dịch Y. Làm bay hơi Y, chỉ thu được 164,7 gam hơi nước và 44,4 gam hỗn hợp chất rắn khan Z. Đốt cháy hoàn toàn Z, thu được 23,85 gam N a 2 C O 3 ; 56,1 gam C O 2 và 14,85 gam H 2 O. Mặt khác, Z phản ứng với dung dịch H 2 S O 4 loãng (dư), thu được hai axit cacboxylic đơn chức và hợp chất T (chứa C, H, O và M T < 126 ). Số nguyên tử H trong phân tử T bằng
A. 8
B. 6
C. 10
D. 12 Đáp án là: A. 8 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Is English the unique language spoken in Australia?
A. Yes, it is.
B. Yes, there is.
C. No, it isn’t
D. No, there isn’t. Đáp án là: D. No, there isn’t </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Nghiệm của hệ phương trình (3x−2y=135x+3y=−10) là(x_0;y_0). Giá trị của biểu thức A=2x_0+y_0 bằng:
A.−3
B.3
C.4
D.−4 Đáp án là: A.−3 </s> | [
1,
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29871,
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29901,
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298,
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<s> Chọn đáp án đúng với câu hỏi: Số điện thoại ở Huyện Củ Chi có 7 chữ số và bắt đầu bởi 3 chữ số đầu tiên là 790. Hỏi ở Huyện Củ Chi có tối đa bao nhiêu máy điện thoại:
A. 1000
B. 100000
C. 10000
D. 1000000 Đáp án là: C. 10000 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Đa thức x^6-y^6 được phân tích thành
A. (x+y)^2(x^2-xy+y^2)(x^2+xy+y^2)
B. (x+y)(x^2-2xy+y^2)(x-y)(x^2+2xy+y^2)
C. (x+y)(x^2-xy+y^2)(x-y)(x^2+xy+y^2)
D. (x+y)(x^2+2xy+y^2)(y-x)(x^2+xy+y^2) Đáp án là: C. (x+y)(x^2-xy+y^2)(x-y)(x^2+xy+y^2) </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Trong các công thức sau, công thức nào sai?
A. cot2x=(cot^2x−1)/(2cotx);
B. tan2α = (2tanα)/(1+tan^2α);
C. sin3α = 3sinα − 4sin^3α ;
D. cos3α = 4cos^3α − 3cosα. Đáp án là: B. tan2α = (2tanα)/(1+tan^2α); </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Thực hiện các thí nghiệm sau ở điều kiện thường: (a) Sục khí H 2 S vào dung dịch NaOH. (b) Cho kim loại Na vào nước. (c) Sục khí Cl 2 vào dung dịch Ca(OH) 2. (d) Cho NH 4 Cl vào dung dịch NaOH. (e) Cho bột Zn vào dung dịch HNO 3. Số thí nghiệm xảy ra phản ứng oxi hóa – khử là
A. 3.
B. 4.
C. 2.
D. 5. Đáp án là: A. 3. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Glucozơ lên men thành ancol etylic, toàn bộ khí sinh ra được dẫn vào dung dịch Ca(OH) 2 dư tách ra 40 gam kết tủa, biết hiệu suất lên men đạt 75%. Khối lượng glucozơ cần dùng bằng bao nhiêu gam?
A. 24 g
B. 40 g
C. 50 g
D. 48 g Đáp án là: D. 48 g </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Có 4 bình không nhãn, mỗi bình đựng 1 trong các chất lỏng sau: rượu propylic, benzen, glixêrin, và hexen. Hóa chất để nhận biết chất có trong mỗi bình là:
A. Cu(OH) 2
B. dd Br 2
C. Na
D. Cả A, B, C Đáp án là: D. Cả A, B, C </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một trong những ý nghĩa quan trọng của cuộc Cách mạng Tân Hợi năm 1911 ở Trung Quốc là
A. lật đổ chính quyền Mãn Thanh, thành lập nước Cộng hòa Nhân dân Trung Hoa.
B. giải phóng Trung Quốc khỏi ách nô dịch của các nước thực dân, đế quốc phương Tây.
C. tạo điều kiện thuận lợi cho sự phát triển của chủ nghĩa tư bản ở Trung Quốc.
D. mở đường cho Trung Quốc tiến lên xây dựng chủ nghĩa xã hội. Đáp án là: C. tạo điều kiện thuận lợi cho sự phát triển của chủ nghĩa tư bản ở Trung Quốc. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Dãy các chất nào sau đây đều làm mất màu dung dịch brom?
A. CH 4 ; C 6 H 6 ;
B. C 2 H 4; CH 4 ;
C. CH 4; C 2 H 4 ;
D. C 2 H 4 ; C 2 H 2. Đáp án là: D. C 2 H 4 ; C 2 H 2 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: We use lot of energy - in our homes, in businesses, in industry, and for traveling between different places.
A. lot of
B. industry
C. traveling
D. different Đáp án là: A. lot of </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho hàm số y=(x−3)/(x^3−3mx^2+(2m^2+1)x−m). Có bao nhiêu giá trị nguyên thuộc đoạn (−6;6) của tham số m để đồ thị hàm số có bốn đường tiệm cận?
A. 12
B. 9
C. 8
D. 11 Đáp án là: B. 9 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một con lắc lò xo treo thẳng đứng. nâng vật lên để lò xo không biến dạng rồi thả nhẹ thì vật dao động điều hoà thẳng đứng quanh vị trí cân bằng O. khi vật đi qua vị trí có tọa độ x = 2, 5 2 c m thì có vận tốc 50 cm/s. Lấy g = 10 c m / s 2. Tính từ lúc thả vật, ở thời điểm vật đi được quãng đường 27,5 cm thì gia tốc của vật có độ lớn bằng:
A. 5 2 m / s 2
B. 5 m / s 2
C. 5, 0 m / s 2
D. 2, 5 m / s 2 Đáp án là: C. 5, 0 m / s 2 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Điện áp tức thời giữa hai đầu đoạn mạch có dạng u = 100 2 cos ( 100 πt ) V. Điện áp hiệu dụng giữa hai đầu đoạn mạch là
A. U = 100V
B. U = 141 V
C. U = 200V
D. U = 50V Đáp án là: A. U = 100V </s> | [
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1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Dùng dung dịch NH 3 dư nhận biết cation Cu 2+ cho hiện tượng gì?
A. Có kết tủa trắng
B. Có kết tủa xanh
C. Dung dịch phức màu xanh
D. Không có hiện tượng gì Đáp án là: C. Dung dịch phức màu xanh </s> | [
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31280,
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30712,
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305,
405,
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<s> Chọn đáp án đúng với câu hỏi: (3) ________Koreans have kept several aspects of the traditional ceremony
A. If only
B. As though
C. As
D. Although Đáp án là: D. Although </s> | [
1,
1,
29871,
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30128,
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865,
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29875,
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550,
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<s> Chọn đáp án đúng với câu hỏi: Theo Đacuyn, đối tượng của tiến hóa là
A. Loài
B. Cá thể
C. NST
D. Quần thể Đáp án là: B. Cá thể </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Circle one letter to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions. These photos brought back many sweet memories of our trip to Hanoi last year.
A. revised
B. released
C. caught
D. recalled Đáp án là: A. revised </s> | [
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1,
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274,
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29875,
29901,
27927,
697,
5497,
304,
12266,
278,
1734,
29898,
29879,
29897,
315,
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<s> Chọn đáp án đúng với câu hỏi: I know she is a kind woman because I have never met her before.
A. kind
B. because
C. have
D. her Đáp án là: B. because </s> | [
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1,
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29901,
306,
1073,
1183,
338,
263,
2924,
6114,
1363,
306,
505,
2360,
1539,
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<s> Chọn đáp án đúng với câu hỏi: Dân cư châu Âu chủ yếu thuộc chủng tộc nào?
A. Môn-gô-lô-it.
B. Nê-grô-it.
C. Ơ-rô-pê-ô-it.
D. Ôx-tra-lô-it. Đáp án là: C. Ơ-rô-pê-ô-it. </s> | [
1,
1,
29871,
678,
30975,
29876,
29871,
30128,
29976,
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1715,
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30030,
865,
325,
31280,
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274,
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7266,
31500,
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2723,
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158,
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31500,
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319,
31500,
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<s> Chọn đáp án đúng với câu hỏi: Mở màn chiến dịch Biên giới thu – đông năm 1950, quân dân Việt Nam tấn công vào cứ điểm của địch ở
A. Đông Khê.
B. Thất Khê.
C. Cao Bằng.
D. Lạng Sơn. Đáp án là: A. Đông Khê. </s> | [
1,
1,
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678,
30975,
29876,
29871,
30128,
29976,
29886,
29871,
1715,
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865,
325,
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274,
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298,
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29875,
29901,
4546,
207,
158,
207,
140,
611,
30712,
29876,
521,
347,
31500,
30103... | [
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<s> Chọn đáp án đúng với câu hỏi: Este mạch hở có công thức tổng quát là
A. C n H 2n+2-2a-2b O 2b
B. C n H 2n-2 O 2
C. C n H 2n + 2-2b O 2b
D. C n H 2n O 2 Đáp án là: A. C n H 2n+2-2a-2b O 2b </s> | [
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1,
1,
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<s> Chọn đáp án đúng với câu hỏi: The idea was that, however badly you sang everyone applauded at the end and it proved the perfect... (38)...for stressful Japanese businessmen to relax.
A. behaviour
B. road
C. way
D. thing Đáp án là: A. behaviour </s> | [
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1,
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678,
30975,
29876,
29871,
30128,
29976,
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29871,
1715,
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865,
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274,
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298,
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29901,
450,
2969,
471,
393,
29892,
3138,
28042,
366,
13625,
14332,
623,
43... | [
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<s> Chọn đáp án đúng với câu hỏi: Jenny and Jimmy are talking about university education. - Jenny: “I think having a university degree is the only way to succeed in life.” - Jimmy: “________. There are successful people without a degree.”
A. That’s life.
B. That’s all right.
C. I don’t quite agree.
D. I can’t agree more. Đáp án là: C. I don’t quite agree. </s> | [
1,
1,
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678,
30975,
29876,
29871,
30128,
29976,
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1715,
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1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Lực căng bề mặt tác dụng lên một đoạn đường nhỏ bất kì trên bề măt của chất lỏng không có đặc điểm
A. có chiều làm giảm diện tích bề mặt chất lỏng.
B. vuông góc với đoạn đường đó.
C. có độ lớn tỉ lệ với độ dài đoạn đường.
D. có phương vuông góc với bề mặt chất lỏng. Đáp án là: D. có phương vuông góc với bề mặt chất lỏng </s> | [
1,
1,
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678,
30975,
29876,
29871,
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1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Nội dung của bài thơ "Xa ngắm thác núi Lư"?
A. Miêu tả vẻ đẹp nhìn từ xa của thác nước từ trên đỉnh Hương Lô thuộc dãy núi Lư, qua đó thể hiện tình yêu thiên nhiên và cá tính mạnh mẽ của tác giả
B. Miêu tả cảnh tráng lệ của thác núi Lư khi nhìn từ xa
C. Thể hiện tâm hồn yêu thiên nhiên, phóng khoáng của tác giả
D. Cả 3 đáp án trên Đáp án là: D. Cả 3 đáp án trên </s> | [
1,
1,
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29876,
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3... | [
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1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: We intend to ________ with the old system as soon as we have developed a better one.
A. do up
B. do in
C. do away
D. do down Đáp án là: C. do away </s> | [
1,
1,
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678,
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1334,
24042,
304,
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22359,
411,
278,
2030,
1788,
408,
4720... | [
1,
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<s> Chọn đáp án đúng với câu hỏi: Việt Nam gia nhập ASEAN vào thời gian nào?
A. 1992
B. 1994
C. 1995
D. 1996 Đáp án là: C. 1995 </s> | [
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330,
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1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Vì sao sau Chiến tranh thế giới thứ nhất, phong trào yêu nước theo khuynh hướng dân chủ tư sản phát triển mạnh mẽ?
A. Chủ nghĩa Mác – Lê-nin được truyền bá sâu rộng vào Việt Nam.
B. Do ảnh hưởng tư tưởng Tam dân của Tôn Trung Sơn.
C. Giai cấp công nhân đã chuyển sang đấu tranh tự giác.
D. Thực dân Pháp đang trên đà suy yếu. Đáp án là: B. Do ảnh hưởng tư tưởng Tam dân của Tôn Trung Sơn. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Chiết suất tuyệt đối của một môi trường
A. cho biết một tia sáng khi đi vào môi trường đó sẽ bị khúc xạ nhiều hay ít
B. là chiết suất tỉ đối của môi trường đó đối với chân không
C. là chiết suất tỉ đối của môi trường đó đối với không khí
D. cho biết một tia sáng khi đi vào môi trường đó sẽ bị phản xạ nhiều hay ít Đáp án là: B. là chiết suất tỉ đối của môi trường đó đối với chân không </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Lựa chọn đáp án đúng nhất:Một cửa hàng tuần lễ đầu bán được 219,5 m vải. Tuần lễ sau cửa hàng đó bán được nhiều hơn tuần lễ đầu 85,8 m vải. Hỏi cả hai tuần lễ cửa hàng đó bán được tất cả bao nhiêu mét vải?
A. 524,5 m
B. 524,6 m
C. 524,7 m
D. 524,8 m Đáp án là: D. 524,8 m </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Điền vào chỗ trống để hoàn thành thông tin viết về U-xa-chốp? “Ông có hàng trăm cuốn sách viết về (...) được xuất bản tại Nga. Nhiều sách của ông được dịch ra nhiều thứ tiếng trên thế giới như Nhật Bản, Ba Lan, Serbia.”
A. Người cao tuổi
B. Người nghèo
C. Trẻ em
D. Quý tộc Đáp án là: C. Trẻ em </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Every conversation comes with a host of non-verbal cues - facial expressions, body language, etc. - that may (49)_______ contradict what we're saying.
A. intentional
B. unintentional
C. intentionally
D. unintentionally Đáp án là: D. unintentionally </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Chọn câu sai:
A. Công của trọng lượng có thể có giá trị dương hay âm.
B. Công của trọng lực không phụ thuộc dạng đường đi của vật
C. Công của lực ma sát phụ thuộc vào dạng đường đi của vật chịu lực
D. Công của lực đàn hồi phụ thuộc dạng đường đi của vật chịu lực Đáp án là: D. Công của lực đàn hồi phụ thuộc dạng đường đi của vật chịu lực </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Gaining entry to a house through a small window _______.
A. is surprisingly difficult
B. is not as difficult as people think
C. is less likely to happen than gaining entry through a door
D. is tried only by very determined burglars Đáp án là: B. is not as difficult as people think </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Đoạn mạch gồm hai hộp kín X và Y mắc nối tiếp, mỗi hộp chứa hai trong ba phần tử mắc nối tiếp: điện trở thuần, cuộn cảm thuần, tụ điện. Đặt vào hai đầu đoạn mạch một hiệu điện thế xoay chiều u = U 0 cos2πft, U 0 không đổi, f thay đổi được. Cho f thay đổi thu được đồ thị sự phụ thuộc của công suất tỏa nhiệt trên hộp X (P X ) và hộp Y (P Y ) theo f như hình vẽ. Khi f = f 1 thì góc lệch pha giữa hiệu điện thế hai đầu hộp X (u X ) và Y (u Y ) gần với giá trị nào nhất sau đây? Biết u X chậm pha hơn u Y
A. 100 0
B. 120 0
C. 130 0
D. 110 0 Đáp án là: D. 110 0 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Ý nào không phản ánh đúng chính sách ưu tiên của các nước Tây Âu sau Chiến tranh thế giới thứ hai?
A. Tìm cách quay trở lại các thuộc địa cũ của mình.
B. Ra sức củng cố chính quyền của giai cấp tư sản; ổn định tình hình chính trị – xã hội.
C. Tập trung hàn gắn vết thương chiến tranh, khôi phục và phát triển kinh tế.
D. Tìm cách thoát khỏi sự lệ thuộc vào Mĩ. Đáp án là: D. Tìm cách thoát khỏi sự lệ thuộc vào Mĩ </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Lớp nào của vỏ tuyến trên thận tiết ra hoocmôn điều hoà đường huyết?
A. Lớp lưới
B. Lớp cầu
C. Lớp sợi
D. Tất cả các phương án còn lại Đáp án là: C. Lớp sợi </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Only after the teacher explained the question did everything begin to fall into ______.
A. norm
B. scale
C. action
D. place Đáp án là: D. place </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một vật nhỏ dao động điều hòa dọc theo trục Ox với biên độ 5cm, chu kỳ 2s. Tại thời điểm t = 0, vật đi qua vị trí cân bằng theo chiều dương. Phương trình dao động của vật là
A. x = 5cos(2πt – π/2) (cm)
B. x = 5cos(πt + π/2) (cm)
C. x = 5cos(πt – π/2) (cm)
D. x = 5cos(2πt + π/2) (cm) Đáp án là: C. x = 5cos(πt – π/2) (cm) </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một vật dao động điều hòa theo phương trình x = 4 cos ω t − 2 π 3 ( c m ). Trong giây đầu tiên vật đi được quãng đường 6cm. Hỏi trong giây thứ 2013 vật đi được quãng đường là bao nhiêu?
A. 5cm.
B. 4cm.
C. 6cm.
D. 12cm. Đáp án là: B. 4cm. </s> | [
1,
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29876,
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29976,
29886,
29871,
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865,
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274,
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29884,
298,
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29901,
4546,
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31500,
29873,
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31214,
31500,
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1146,
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29... | [
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1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Choose the letter A, B, C or D to complete the sentences with given words My/ bedroom/ house/ in my/ favorite/ room/ is/ my.
A. My house favorite room in my bedroom is my.
B. My my favorite is room bedroom in my house.
C. My favorite room in my house is my bedroom.
D. My favorite bedroom is room my in my house. Đáp án là: C. My favorite room in my house is my bedroom. </s> | [
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1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Khử hoàn toàn một oxit của kim loại M bằng khí CO ở nhiệt độ cao, thu được 8,96 gam kim loại M và 5,376 lít khí CO 2 (đktc). Oxit của kim loại là
A. F e 3 O 4
B. CuO
C. FeO
D. F e 2 O 3 Đáp án là: D. F e 2 O 3 </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: According to paragraph 2, what does intermittent fasting involve?
A. It involves weekly abandonment of all intake of sugar.
B. It involves a month-long abstinence from alcoholic drinks.
C. It involves alternating periods of restriction and normal eating.
D. It involves elimination of all kinds of meat and animal products. Đáp án là: C. It involves alternating periods of restriction and normal eating. </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Câu thơ sau thuộc tác phẩm nào dưới đây? Đau đớn thay phận đàn bà Kiếp sinh ra thế biết là tại đâu
A. Đoạn trường tân thanh
B. Bắc hành tạp lục
C. Văn chiêu hồn
D. Thăng long thành giả ca Đáp án là: A. Đoạn trường tân thanh </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Một người chuyển động thẳng có độ dịch chuyển d 1 tại thời điểm t 1 và độ dịch chuyển d 2 tại thời điểm t 2. Vận tốc trung bình của vật trong khoảng thời gian từ t 1 đến t 2 là:
A. \({v_{tb}} = \frac{{{d_1} - {d_2}}}{{{t_1} + {t_2}}}\).
B. \({v_{tb}} = \frac{{{d_2} - {d_1}}}{{{t_2} - {t_1}}}\).
C. \({v_{tb}} = \frac{{{d_1} + {d_2}}}{{{t_2} - {t_1}}}\).
D. \({v_{tb}} = \frac{1}{2}\left( {\frac{{{d_1}}}{{{t_1}}} + \frac{{{d_2}}}{{{t_2}}}} \right)\). Đáp án là: B. \({v_{tb}} = \frac{{{d_2} - {d_1}}}{{{t_2} - {t_1}}}\). </s> | [
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1,
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1... |
<s> Chọn đáp án đúng với câu hỏi: Hỗn hợp X gồm hai este đơn chức, mạch hở, là đồng phân cấu tạo của nhau. Thủy phân hoàn toàn m gam X bằng dung dịch NaOH rồi cô cạn, được 40,2 gam chất rắn Y và a gam một ancol Z. Nung Y với CaO cho đến khi phản ứng kết thúc, thu được 8,4 gam một chất khí. Oxi hóa a gam Z thu được hỗn hợp T gồm axit cacboxylic, andehit, ancol dư và nước. Cho T tác dụng hết với Na dư, thu được 4,48 lít H 2 (đktc). Cho T vào dung dịch KHCO 3 dư, thoát ra 2,24 lít CO 2 (đktc). Cho T phản ứng tráng bạc hoàn toàn, tạo ra 86,4 gam Ag. Giá trị của m là
A. 25,8.
B. 30,0.
C. 29,4.
D. 26,4. Đáp án là: C. 29,4. </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: The municipal authority made a to improving the air quality of the city.
A. commitment
B. requirement
C. candidate
D. Applicant Đáp án là: A. commitment </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Ancol và amin nào sau đây cùng bậc:
A. (CH 3 ) 3 COH và (CH 3 ) 2 NH.
B. C 6 H 5 NHCH 3 và CH 3 -CHOH-CH 3.
C. C 2 H 5 OH và (CH 3 ) 2 NH.
D. (CH 3 ) 2 CHOH và (CH 3 ) 2 CH-NH 2. Đáp án là: B. C 6 H 5 NHCH 3 và CH 3 -CHOH-CH 3. </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Tìm đa thức A sao cho A + x^3y - 2x^2y + x - y = 2y + 3x + x^2y
A. A = -x^3y + 3x^2y - 2x - 3y
B. A = -x^3y + x^2y - 2x - 3y
C. A = -x^3y + 3x^2y + 2x + 3y
D. A = x^3y - 3x^2y + 2x + 3y Đáp án là: C. A = -x^3y + 3x^2y + 2x + 3y </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: The wine had made him a little ______ and couldn’t control his movement.
A. narrow–minded
B. light–headed
C. light–footed
D. light–hearted Đáp án là: D. light–hearted </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một sóng cơ truyền dọc theo trục có phương trình cm, trong đó là toạ độ được tính bằng mét, là thời gian được tính bằng giây. Tốc độ truyền sóng có giá trị xấp xỉ là
A. 33,1 m/s.
B. 31,4 m/s.
C. 10,0 m/s.
D. 33,4 m/s. Đáp án là: B. 31,4 m/s. </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Phát biểu nào sau đây là đúng
A. Tơ visco, tơ xenlulozơ axetat đều thuộc loại tơ tổng hợp
B. Tơ nilon-6,6 được điều chế từ hexametylenđiamin và axit axetic
C. Polietilen và poli(vinyl clorua) là sản phẩm của phản ứng trùng ngưng
D. Sợi bông, tơ tằm thuộc loại polime thiên nhiên Đáp án là: D. Sợi bông, tơ tằm thuộc loại polime thiên nhiên </s> | [
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Chọn từ có phần gạch chân đọc khác các từ còn lại
A. r e member
B. b e come
C. d e sign
D. diff e rent Đáp án là: D. diff e rent </s> | [
1,
1,
29871,
678,
30975,
29876,
29871,
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29976,
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29871,
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1,
1,
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1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Phương trình chuyển động của một vật là x = 10 + 3 t + 0, 2 t 2 (x tính bằng mét, t tính bằng giấy). Quãng đường vật đi được tính từ thời điểm t = 5s đến thời điểm t = 10s là:
A. 60m.
B. 50m.
C. 30m.
D. 20m. Đáp án là: C. 30m. </s> | [
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1,
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1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Cho biểu thức \[{\rm{A}} = \frac{{ - 2}}{9} + \frac{{ - 3}}{4} + \frac{3}{5} + \frac{1}{{15}} + \frac{1}{{57}} + \frac{1}{3} + \frac{{ - 1}}{{36}}\]. Giá trị của biểu thức A là:
A. \(\frac{1}{{ - 57}}\);
B. \(\frac{1}{{57}}\);
C. \(\frac{{ - 1}}{{36}}\);
D. 0. Đáp án là: B. \(\frac{1}{{57}}\); </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Polime nào sau đây thuộc loại polime thiên nhiên
A. Polietilen
B. Tơ tằm
C. Polieste
D. Polipropilen Đáp án là: B. Tơ tằm </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Một sóng âm có dạng hình cầu được phát ra từ nguồn có công suất P. Tại một điểm cách nguồn một khoảng d có cường độ âm là I. Hệ thức đúng là
A. I = 2 P π d 2
B. I = 2 P π d 2
C. I = P 2 π d 2
D. I = P 4 π d 2 Đáp án là: D. I = P 4 π d 2 </s> | [
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1,
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1... |
<s> Chọn đáp án đúng với câu hỏi: Complete each of the following sentences with the correct answer (A, B, C or D). Identify your answer by writing the corresponding letter A, B, C or D on your answer sheet. Nathalie seems very tough at work. She’s a different person at home, _________.
A. though
B. although
C. as though
D. even though Đáp án là: A. though </s> | [
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278,
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313,
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1... |
<s> Chọn đáp án đúng với câu hỏi: Hòa tan hết 30 gam rắn gồm Mg, MgO, MgCO 3 trong HNO 3 thấy có 2,15 mol HNO 3 phản ứng. Sau phản ứng thu được 4,48 lít (đktc) hỗn hợp khí NO, CO 2 có tỉ khối so với H 2 là 18,5 và dung dịch X chứa m gam muối. Giá trị của m là
A. 134,80
B. 143,20
C. 153,84
D. 149,84 Đáp án là: B. 143,20 </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Công thức nào sau đây không đúng?
A. P = I 2.R
B. P = U/I
C. P = U 2 R
D. P = U.I Đáp án là: B. P = U/I </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: My sister is very fond ______eating chocolate candy.
A. with
B. about
C. at
D. of Đáp án là: D. of </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Hai khu vực nào sau đây ở châu Á có mật độ dân số cao nhất?
A. Bắc Á, Nam Á.
B. Đông Nam Á, Tây Á.
C. Nam Á, Đông Á.
D. Đông Á, Tây Nam Á. Đáp án là: C. Nam Á, Đông Á. </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Những sông lớn ở Châu Á đổ ra Ấn Độ Dương là:
A. Ôbi, Iênitxây, Lêna
B. Hồng, Amua, Cửu Long
C. Hoàng Hà, Trường Giang, Mê Công
D. Ấn, Hằng, Tigrơ – Ơphrát Đáp án là: D. Ấn, Hằng, Tigrơ – Ơphrát </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Vì sao Lê-nin gọi chủ nghĩa đế quốc Anh là : Chủ nghĩa đế quốc thực dân”?
A. Nước Anh có thuộc địa và lãnh thổ rộng lớn.
B. Tư sản Anh chú trọng đầu tư vào thuộc địa.
C. Tư sản Anh xâm chiếm và bóc lột một hệ thống thuộc địa rộng lớn trên thế giới.
D. Anh có một nền kinh tế công nghiệp phát triển bậc nhất thế giới. Đáp án là: C. Tư sản Anh xâm chiếm và bóc lột một hệ thống thuộc địa rộng lớn trên thế giới. </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Đâu không phải khó khăn của thị trường đối với ngành nông nghiệp nước ta?
A. Sự bất ổn của thị trường xuất khẩu.
B. Sức mua của thị trường trong nước hạn chế.
C. Yêu cầu về chất lượng sản phẩm của thị trường.
D. Nhu cầu của thị trường ngày càng tăng. Đáp án là: D. Nhu cầu của thị trường ngày càng tăng </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Về điều kiện tự nhiên Đồng bằng sông Hồng gặp khó khăn nào sau đây?
A. Địa hình bị chia cắt.
B. Xuất hiện nhiều bão lớn.
C. Gió tây khô nóng
D. Thời tiết bất thường Đáp án là: D. Thời tiết bất thường </s> | [
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29901,
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30128,
347,
31500,
30712,
29884,
413,
347,... | [
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Nông nghiệp bị phá hoại nghiêm trọng, nông dân phải rời bỏ ruộng đồng, xóm làng đi lang thang kiếm sống. Đó là tình hình kinh tế
A. ở Đàng Trong
B. ở Đàng Ngoài
C. ở cả hai đàng
D. thời chúa Nguyễn Đáp án là: B. ở Đàng Ngoài </s> | [
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1,
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29876,
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274,
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298,
228,
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29875,
29901,
1939,
31500,
865,
8736,
29882,
347,
31214,
31500,
29886,
4768,
31214,... | [
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Giai đoạn nào của nền kinh tế Nhật Bản được coi là “Thần kì Nhật Bản”?
A. 1973-1974.
B. Trước 1952.
C. 1991 đến nay.
D. 1952-1973. Đáp án là: D. 1952-1973 </s> | [
1,
1,
29871,
678,
30975,
29876,
29871,
30128,
29976,
29886,
29871,
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29901,
402,
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30128,
19807,
31214,
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1055,
30712,
29877,
27... | [
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Sau khi tiến vào Việt Nam (1945), quân TRung Hoa Dân quốc đã có động thái gì?
A. Sách nhiễu chính quyến cách mạng, đòi cải tổ Chính phủ, thay đổi quốc kì, Hồ Chí Minh phải từ chức.
B. Sử dụng một bộ phận quân đội Nhật chờ giải giáp, đánh úp trụ sở chính quyền cách mạng.
C. Ủng hộ các hành động khiêu khích quân sự của thực dân Anh và Pháp.
D. Công khai tuyên bố chống lại chính quyền cách mạng của Việt Nam. Đáp án là: A. Sách nhiễu chính quyến cách mạng, đòi cải tổ Chính phủ, thay đổi quốc kì, Hồ Chí Minh phải từ chức. </s> | [
1,
1,
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29871,
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29976,
29886,
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1715,
29871,
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30030,
865,
325,
31280,
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274,
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298,
228,
190,
146,
29875,
29901,
23863,
413,
2918,
22134,
31500,
30103,
29876,
2947,
30712,
29877,
217... | [
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
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1,
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1,
1,
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1,
1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Đâu là anh hùng đã nhờ đồng đội chặt đứt cánh tay bị thương của mình để tiếp tục chiến đấu trong chiến dịch Biên giới thu - đông năm 1950?
A. Trần Cừ
B. Phan Đình Giót
C. La Văn Cầu
D. Bế Văn Đàn Đáp án là: C. La Văn Cầu </s> | [
1,
1,
29871,
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29876,
29871,
30128,
29976,
29886,
29871,
1715,
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30030,
865,
325,
31280,
29875,
274,
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29884,
298,
228,
190,
146,
29875,
29901,
29871,
30250,
29874,
31500,
29884,
425,
30712,
385,
29882,
22888,
307... | [
1,
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1,
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1,
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1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Sooner or later, I'm going to have to face the music because of my lies and deceit.
A. be criticized
B. be blamed
C. be praised
D. be scolded Đáp án là: C. be praised </s> | [
1,
1,
29871,
678,
30975,
29876,
29871,
30128,
29976,
29886,
29871,
1715,
29871,
30128,
30030,
865,
325,
31280,
29875,
274,
30057,
29884,
298,
228,
190,
146,
29875,
29901,
1105,
265,
261,
470,
2678,
29892,
306,
29915,
29885,
2675,
304,
505... | [
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
1,
1,
1,
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1,
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1,
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1,
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1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: As the conversation went on, he became __________.
A. more talkatively
B. the more talkative
C. more and more talkative
D. more and more talkatively Đáp án là: C. more and more talkative </s> | [
1,
1,
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678,
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29871,
30128,
29976,
29886,
29871,
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865,
325,
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29875,
274,
30057,
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298,
228,
190,
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29875,
29901,
1094,
278,
14983,
3512,
373,
29892,
540,
3897,
903,
14365,
5396,
13... | [
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Sắp xếp tính bazơ của các chất sau theo thứ tự tăng dần:
A. NH 3 < C 2 H 5 NH 2 < C 6 H 5 NH 2.
B. C 2 H 5 NH 2 < NH 3 < C 6 H 5 NH 2.
C. C 6 H 5 NH 2 < NH 3 < C 2 H 5 NH 2.
D. C 6 H 5 NH 2 < C 2 H 5 NH 2 < NH 3. Đáp án là: C. C 6 H 5 NH 2 < NH 3 < C 2 H 5 NH 2. </s> | [
1,
1,
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29871,
30128,
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29901,
5701,
207,
137,
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921,
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31500,
30103,
29886,
19538,... | [
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Một dòng điện không đổi có cường độ 3A thì sau một khoảng thời gian có một điện lượng 4C chuyển qua một tiết diện thẳng. Cùng thời gian đó, với dòng điện 4,5A thì có một điện lượng chuyển qua tiết diện thẳng là:
A. 4C
B. 8C
C. 4,5C
D. 6C Đáp án là: D. 6C </s> | [
1,
1,
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29976,
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865,
325,
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29901,
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31500,
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437,
30712,
865,
29871,
30128,
347,
31214,... | [
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1,
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1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Trong một mạch kín, hai cực của pin được nối với nhau bằng một dây đồng. Các electron tự do trong dây sẽ bị cực nào hút, cực nào đẩy?
A. Cực dương hút, cực âm đẩy
B. Cực dương đẩy, cực âm hút
C. Hai cực cùng hút
D. Hai cực cùng đẩy Đáp án là: A. Cực dương hút, cực âm đẩy </s> | [
1,
1,
29871,
678,
30975,
29876,
29871,
30128,
29976,
29886,
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29871,
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30030,
865,
325,
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29875,
274,
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29901,
1605,
549,
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31500,
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611,
31214,
305,
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30103,
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1,
1,
1,
1,
1,
1,
1,
1,
1... |
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