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<s> Chọn đáp án đúng với câu hỏi: _____ very upset if you turn down his offer of help.
A. Is
B. He'll be
C. Will be
D. He would be Đáp án là: B. He'll be </s> | [
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310,
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<s> Chọn đáp án đúng với câu hỏi: Mỗi hoa lưỡng tính thường có bao nhiêu nhuỵ?
A. 5
B. 3
C. 2
D. 1 Đáp án là: D. 1 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: A. parachute B. bewilder C. contribute D. determine
A. parachute
B. bewilder
C. contribute
D. determine Đáp án là: A. parachute </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Đặc điểm nào sau đây là đúng khi nói về tính đặc hiệu của mã di truyền?
A. Một bộ ba chỉ mã hoá cho một loại axitamin
B. Một axitamin có thể được mã hoá bởi hai hay nhiều bộ ba
C. Có một số bộ ba không mã hoá axitamin
D. Có 61 bo... | [
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347,
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<s> Chọn đáp án đúng với câu hỏi: Một sợi dây AB dài 100cm căng ngang, đầu B cố định, đầu A gắn với một nhánh của âm thoa dao động điều hòa với tần số 40Hz. Trên dây AB có một sóng dừng ổn định, A được coi là nút sóng. Tốc độ truyền sóng trên dây là 20m/s. Ti... | [
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<s> Chọn đáp án đúng với câu hỏi: Công thức nào sau đây là công thức tính áp suất:
A. p = F S
B. p = FS
C. p = P S
D. p = dV Đáp án là: A. p = F S </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 that differs from the other three in the position ofprimary stress in each of the following questions.
A. comfortably
B. especially
C. carefully
D. possibly Đáp án là: B. especially </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Từ cải cách Minh Trị (1868), trong quá trình phát triển đất nước, lĩnh vực nào luôn được xem là quốc sách hàng đầu ở Nhật Bản?
A. Kinh tế.
B. Giáo dục
C. Chính trị
D. Quân sự. Đáp án là: B. Giáo dục </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Thành phần nào sau đây không tham gia trực tiếp vào quá trình dịch mã?
A. ADN
B. mARN
C. tARN
D. Riboxom Đáp án là: A. ADN </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Liên kết nào sau đây được hình thành giữa các phân tử nước?
A. Liên kết cộng hóa trị.
B. Liên kết hydrogen.
C. Liên kết ion.
D. Cả liên kết cộng hóa trị và liên kết hydrogen. Đáp án là: B. Liên kết hydrogen. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho tam giác ABC có G là trọng tâm, I là trung điểm của đoạn thẳng BC. Đẳng thức nào sau đây là đúng?
A. \[\overrightarrow {GA} = 2\overrightarrow {GI} \];
B. \(\overrightarrow {IG} = \frac{{ - 1}}{3}\overrightarrow {IA} \);
C. \[\overrightarrow {GB} + \overrightarrow {GC} = 2\overrigh... | [
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<s> Chọn đáp án đúng với câu hỏi: Một bản mặt song song có bề dày 6cm, chiết suất n=1,5 được đặt trong không khí. Ảnh S’ của S qua bản mặt song song cách S một đoạn
A. 1cm
B. 2cm
C. 3cm
D. 4cm Đáp án là: B. 2cm </s> | [
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<s> Chọn đáp án đúng với câu hỏi: What does 3Rs stand.....? It’s Reduce, Reuse, Recycle.
A. at
B. for
C. on
D. by Đáp án là: B. for </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Hỗn hợp X gồm CH 4, C 3 H 8, C 2 H 4 và C 3 H 4. Đem đốt cháy hoàn toàn hỗn hợp X bằng không khí (chứa 80% N 2 và 20% O 2 về thể tích), sau phản ứng thu được một hỗn hợp gồm a mol N 2, 0,2 mol O 2, 0,4 mol CO 2 và 0,5 mol H 2 O. Giá trị của... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Gia tốc của vật dao động điều hoà bằng 0 khi
A. Vật ở vị trí có ly độ cực đại
B. Vận tốc của vật cực tiểu
C. Vật ở vị trí có pha dao động cực đại
D. Vật ở vị trí có ly độ bằng không Đáp án là: D. Vật ở vị trí có ly độ ... | [
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<s> Chọn đáp án đúng với câu hỏi: Đặc điểm nào dưới đây không phải là đặc điểm bộ xương thằn lằn?
A. Đốt sống thân mang xương sườn.
B. Đốt sống cổ rất linh hoạt
C. Đốt sống đuôi dài
D. Không có xương sườn. Đáp án là: D. Không có xương sườn </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Điện áp trên tụ điện và cường độ dòng điện trong mạch dao động LC có biểu thức tương ứng là: u = 2 cos 10 6 t ( V ) và i = 4 cos 10 6 t + π 2 (mA). Hệ số tự cảm L và điện dung C của tụ điện lần lượt là
A. L = 0,5 μ H va C = 2 μ F
B. L =... | [
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<s> Chọn đáp án đúng với câu hỏi: Flower oils are..... of the ingredients used in making perfume
A. among expensive
B. among the most expensive
C. being most expensive
D. expensive Đáp án là: B. among the most expensive </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(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions. There are some social situations where smaller non-verbal signals are more appropriate.
A. unsuitable
B. accurate
C. unacceptable
... | [
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<s> Chọn đáp án đúng với câu hỏi: Con lắc lò xo gồm lò xo nhẹ có độ cứng k = 40N/m, vật nhỏ khối lượng m = 100g dao động điều hòa theo phương thẳng dứng, với biên độ A = 5cm, lấy g = 10 m / s 2. Khoảng thời gian lò xo bị giãn trong một chu kỳ dao động của con lắc là:... | [
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<s> Chọn đáp án đúng với câu hỏi: Ở nước ta, các cao nguyên ba-dan tập trung chủ yếu ở vùng nào sau đây?
A. Tây Bắc.
B. Bắc Trung Bộ.
C. Đông Bắc.
D. Tây Nguyên. Đáp án là: D. Tây Nguyên </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Phát biểu nào sau đây là sai với nội dung hai tiên đề của Bo?
A. Nguyên tử có năng lượng xác định khi nguyên tử đó đang ở trạng thái dừng
B. Khi chuyển từ trạng thái dừng có năng lượng thấp sang trạng thái dừng có năng lượng cao... | [
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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 sentence that best completes each of the following exchanges. A: Can you help me? I’d like to know how to turn on this air conditioner. B: ______________
A. You’re welcome. I’m glad to help you.
B. Yes, certainly. First,... | [
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<s> Chọn đáp án đúng với câu hỏi: Trong các nhóm hidrocacbon sau, nhóm hidrocacbon nào có phản ứng đặc trưng là phản ứng cộng?
A. C 2 H 4, C 2 H 2.
B. C 2 H 4, CH 4.
C. C 2 H 4, C 6 H 6.
D. C 2 H 2, C 6 H 6. Đáp án là: A. C 2 H 4, C 2 H 2. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Chiếm vị trí thứ hai trong cơ cấu GDP phân theo ngành kinh tế của Nhật Bản là
A. nông nghiệp
B. dịch vụ
C. công nghiệp
D. ngư nghiệp Đáp án là: C. công nghiệp </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Este X mạch hở, có công thức phân tử C 4 H 6 O 2. Đun nóng a mol X trong dung dịch NaOH vừa đủ, thu được dung dịch Y chứa hai chất đều tráng bạc. Công thức cấu tạo của X là
A. CH 2 =CHCOOCH 3.
B. CH 3 COOCH=CH 2.
C. HCOOCH=CHCH 3.
D. HCOOCH 2 CH=CH 2.... | [
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<s> Chọn đáp án đúng với câu hỏi: Khẩu hiệu “Đánh đuổi phát xít Nhật” thay cho khẩu hiệu “Đánh đuổi Pháp – Nhật” được đưa ra trong văn kiện nào?
A. Hội nghị Ban chấp hành trung ương Đảng tháng 11-1939.
B. Hội nghị Ban chấp hành trung ương Đảng tháng 5-1941,
C. Chỉ thị ... | [
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<s> Chọn đáp án đúng với câu hỏi: Để được một dung dịch có các ion K +,SO 4 2-,Mg 2 +,Cl - thì cần trộn những dung dịch muối nào?
A. KCl, MgSO 4
B. K 2 SO 4, MgCl 2
C. KCl, MgSO 4, MgCl 2
D. Tất cả đều đúng Đáp án là: D. Tất cả đều đúng </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho glixerol phản ứng với hỗn hợp axit béo gồm C 17 H 35 COOH và C 15 H 31 COOH, số loại trieste tối đa được tạo ra là
A. 4
B. 5
C. 3
D. 6 Đáp án là: D. 6 </s> | [
1,
1,
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30975,
29876,
29871,
30128,
29976,
29886,
29871,
1715,
29871,
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865,
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29901,
14542,
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140,
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318,
20... | [
1,
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<s> Chọn đáp án đúng với câu hỏi: Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. It is very difficult to succeed in the music business; nine out of ten bands that release a first record fail to produce a second. Survivi... | [
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1715,
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30030,
865,
325,
31280,
29875,
274,
30057,
29884,
298,
228,
190,
146,
29875,
29901,
7523,
278,
1494,
13382,
322,
2791,
278,
5497,
319,
29892,
350,
2989... | [
1,
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<s> Chọn đáp án đúng với câu hỏi: He ________ the plants. If he had, they wouldn’t have died.
A. needn’t have watered
B. can’t have watered
C. shouldn’t water
D. couldn’t water Đáp án là: B. can’t have watered </s> | [
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1,
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29876,
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29886,
29871,
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865,
325,
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940,
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960,
540,
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896... | [
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<s> Chọn đáp án đúng với câu hỏi: Biến trở không có kí hiệu sơ đồ nào dưới đây?
A.
B.
C.
D. Đáp án là: B. </s> | [
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350,
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140,
413,
1251,... | [
1,
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1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Trong một thí nghiệm giao thoa ánh sáng với hai khe Y – âng trong vùng MN trên màn quan sát, người ta đếm được 13 vân sáng với M và N là hai vân sáng ứng với bước sóng λ 1 = 0,42 μm. Giữ nguyên điều kiện thí nghiệm, thay nguồn sáng đơ... | [
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1,
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865,
325,
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274,
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298,
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29875,
29901,
1605,
549,
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31214,
31500,
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266,
29875,
30103,
8736,
29882,... | [
1,
1,
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1,
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1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Ở vĩ tuyến 66 0 33’ Bắc và Nam, ngày 22 tháng 6 và ngày 22 tháng 12 có ngày hoặc đêm dài suốt
A. 24 giờ.
B. 12 giờ.
C. 20 giờ.
D. 10 giờ. Đáp án là: A. 24 giờ. </s> | [
1,
1,
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30975,
29876,
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30128,
29976,
29886,
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438,
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1,
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1... |
<s> Chọn đáp án đúng với câu hỏi: Giá trị nào sau đây là một nghiệm của phương trình\(\sqrt {3{x^2} - 6x + 1} = \sqrt {{x^2} - 3} \)?
A. 2;
B. 4;
C. 12;
D. 20. Đáp án là: A. 2; </s> | [
1,
1,
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678,
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30128,
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29871,
1715,
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4406,
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534,
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3005... | [
1,
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<s> Chọn đáp án đúng với câu hỏi: Giải bóng chuyền VTV Cup gồm 9 đội bóng tham dự, trong đó có 6 đội nước ngoài và 3 đội của Việt Nam. Ban tổ chức cho bốc thăm ngẫu nhiên để chia thành 3 bảng A, B, C và mỗi bảng có 3 đội. Tính xác suất để 3 đội bóng của Việt Nam ở 3 bảng khác nhau.
A. \(\frac{9}{{28}}\);
B. \(\frac{7}{... | [
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1,
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1... |
<s> Chọn đáp án đúng với câu hỏi: Put the sign ______
A. in where everyone can read it
B. where can everyone read it
C. what everyone can read it
D. where everyone can read it Đáp án là: D. where everyone can read it </s> | [
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13,
29909,
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297,
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143... | [
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1,
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1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. All donations to East Africa Hunger Relief Fund will ______________ hunger relief efforts in five East Africa countries, including Eritrea, Ethiopia, Kenya, Somalia and ... | [
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274,
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29875,
29901,
4485,
278,
5497,
319,
29892,
350,
29892,
315,
470,
360,
373,
596,
... | [
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1,
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1... |
<s> Chọn đáp án đúng với câu hỏi: Hòa tan Fe 3 O 4 vào dung dịch HCl dư, thu được dung dịch X. Cho dãy các chất: MnO 2, Cl 2, KOH, Na 2 CO 3, CuSO 4, HNO 3, Fe, NaNO 3. Số chất trong dãy tác dụng được với dung dịch X là:
A. 6.
B. 5.
C. 4.
D. 7. Đáp án là: D. 7 </s> | [
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1,
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294... | [
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1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Quốc hội khóa I nước Việt Nam Dân chủ Cộng hòa quyết định lưu hành tiền Việt Nam trong cả nước thay cho tiền Đông Dương từ ngày
A. 8/9/1945.
B. 23/11/1946.
C. 6/1/1946.
D. 22/5/1946. Đáp án là: B. 23/11/1946. </s> | [
1,
1,
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1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Ankan X có công thức phân tử C 5 H 12. Clo hóa X, thu được 4 sản phẩm dẫn xuất monoclo. Tên gọi của X là
A. 2,2-đimetylpropan
B. 2- metylbutan
C. pentan
D. 2- đimetylpropan Đáp án là: B. 2- metylbutan </s> | [
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1... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Kim cương được sử dụng làm mũi khoan, dao cắt thủy tinh và bột mài vì kim cương là chất có độ cứng rất lớn. Tính chất trên một phần là do tinh thể kim cương thuộc loại tinh thể
A. nguyên tử điển hình.
B. kim loại điển hình.
C.... | [
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2... | [
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1,
1,
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<s> Chọn đáp án đúng với câu hỏi: It gets_____ to understand what the professor has explained.
A. the more difficult
B. more difficult than
C. the most difficult
D. more and more difficult Đáp án là: D. more and more difficult </s> | [
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739,
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298... | [
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1,
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1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Có 6 dung dịch đựng trong 6 bình riêng biệt mất nhãn, mỗi bình chứa một trong các dung dịch NaHCO 3, Na 2 CO 3, NaHSO 4, BaCl 2, Ba(OH) 2, H 2 SO 4. Không dùng thêm bất kì hóa chất nào khác làm thuốc thử, kể cả quỳ tím và đun nóng, thì số b... | [
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1,
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3189,
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270,
686,
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... | [
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Địa danh gắn liền với cuộc kháng chiến theo chiến thuật du kích của Triệu Quang Phục chống quân Lương là
A. động Khuất Lão.
B. cửa sông Tô Lịch.
C. thành Long Biên.
D. đầm Dạ Trạch. Đáp án là: D. đầm Dạ Trạch </s> | [
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3010... | [
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1,
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1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Hỗn hợp X gồm hai este đơn chức. Cho 0,5 mol X tác dụng với dung dịch AgNO 3 / NH 3 dư thu được 43,2 gam Ag. Cho 10,56 gam X tác dụng với dung dịch KOH vừa đủ thu được hỗn hợp hai muối của hai axit đồng đẳng liên tiếp và 6,192 gam hỗn hợp... | [
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8335,
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30478,
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5089,
207,
158,
31214,
29886,
1060,
748,
... | [
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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: Hòa tan hoàn toàn 12 gam hỗn hợp Fe, Cu (tỉ lệ mol 1:1) bằng axit HNO 3, thu được V lít (đktc) hỗn hợp khí X (gồm NO và NO 2 ) và dung dịch Y (chỉ chứa hai muối và axit dư). Tỉ khối của X đối với H 2 bằng 19. Giá trị của V là:
A. 2,24 lít... | [
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10345,
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304,
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307... | [
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1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Sản phẩm của quá trình dịch mã là:
A. ADN
B. mARN
C. rARN
D. Protein Đáp án là: D. Protein </s> | [
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2... | [
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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 that differs from the other three in the position of primary stress in each of the following questions
A. comfortable
B. excellent
C. communicate
D. confident Đáp án là: C. communicate </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Thiên tai mang lại thiệt hại lớn nhất cho cư dân vùng biển là:
A. Sạt lở bờ biển.
B. Nạn cát bay.
C. Triều cường.
D. Bão. Đáp án là: D. Bão </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Loại hình kiến trúc tiêu biểu nhất của Ai Cập cổ đại là
A. nhà hát, sân vận động.
B. nhà thờ, bến cảng, sân vận động.
C. Cung điện, đền thờ và kim tự tháp.
D. Vườn hoa, nhà hát, đền chùa. Đáp án là: C. Cung điện, đền thờ và ki... | [
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1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Vì sao khi tìm gỗ làm nhà, người ta lại lựa chọn lớp gỗ ròng thay vì gỗ dác?
A. Vì phần gỗ này rắn chắc, ít bị mối mọt và có độ bền cơ học cao hơn gỗ dác
B. Vì phần gỗ này có màu sắc bắt mắt, vân đẹp hơn lớp gỗ dác
... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Chiết cành có lợi hơn so với giâm cành ở chỗ
A. Áp dụng được với nhiều cây ăn quả, tỷ lệ cây con sống cao
B. Số lượng cây con tạo ra nhiều hơn
C. Không làm ảnh hưởng tới năng suất của cây mẹ
D. Cây con có đặc tính khác vớ... | [
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1... |
<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. Clothes
B. houses
C. increases
D. rises Đáp án là: A. Clothes </s> | [
1,
1,
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1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Rain falls (A) occasionally in deserts, so (B) desert storms are (C) often violent. (D
A. falls
B. so
C. are
D. violent Đáp án là: B. so </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Chọn đáp án sai. Hai góc đối đỉnh là:
A. Hai góc bằng nhau;
B. Hai góc mà mỗi cạnh của góc này là tia đối của một cạnh của góc kia;
C. Hai góc có tổng số đo bằng 180^o;
D. Hai góc được tạo bởi hai đường thẳng cắt nhau. Đáp án là: C. Hai góc có tổng số đo bằng 180^o; </s> | [
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30128,
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29871,
1715,
872,
2987... | [
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<s> Chọn đáp án đúng với câu hỏi: Máy phát điện xoay chiều bắt buộc phải có các bộ phận chính nào để có thể tạo ra dòng điện?
A. Nam châm vĩnh cửu và sợi dây dẫn nối với hai cực của nam châm điện.
B. Nam châm điện và sợi dây dẫn nối nam châm với đèn.
C. Cuo... | [
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<s> Chọn đáp án đúng với câu hỏi: Cho các nhận định sau. Nhận định nào sai?
A. Dầu cấu tạo từ glixerol và axit béo
B. Protein cấu tạo từ các đơn phân là axit amin
C. Tinh bột cấu tạo từ các đơn phân là galactozo
D. Axit nucleic cấu tạo từ các đơn phân là nucleotit Đáp án là... | [
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<s> Chọn đáp án đúng với câu hỏi: Vật nào dưới đây là vật cách điện?
A. Một đoạn dây thép
B. Một đoạn dây nhôm
C. Một đoạn dây nhựa
D. Một đoạn ruột bút chì Đáp án là: C. Một đoạn dây nhựa </s> | [
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<s> Chọn đáp án đúng với câu hỏi: We will miss the train if we don’t hurry up.
A. We won’t miss the train unless we hurry up.
B. We won’t miss the train if we hurry up.
C. We will miss the train unless we don’t hurry up.
D. We will miss the train unless we hurry up. Đáp án là: D. We will miss the train unless we hurry ... | [
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<s> Chọn đáp án đúng với câu hỏi: Hoà tan hết 2,3g Na kim loại vào 97,8g nước thu được dung dịch có nồng độ:
A. 2,4%.
B. 4,0%.
C. 23,0%.
D. 5,8%. Đáp án là: B. 4,0%. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Biến trở này có điện trở lớn nhất là R b = 20 Ω với cuộn dây được làm bằng hợp kim nikelin có tiết diện S = 0, 5 m m 2. Tính chiều dài của dây dẫn dùng làm điện trở này.
A. 20 m.
B. 30 m.
C. 25 m.
D. 15 m. Đáp án là: C. 25 m. </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Trong thí nghiệm Y−âng về giao thoa ánh sáng, chiếu vào hai khe đồng thời hai ánh sáng đơn sắc có bước sóng λ 1 = 0,66μm và λ 2 = 0,55 μm. Trên màn quan sát, vân sáng bậc 5 của ánh sáng có bước sóng λ 1 trùng với vân sáng bậc mấy của a... | [
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<s> Chọn đáp án đúng với câu hỏi: She is wearing a ________ dress. She is said to be the most beautiful girl in the party.
A. short pink wedding
B. pink wedding short
C. wedding pink short
D. pink short wedding Đáp án là: A. short pink wedding </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Xét phương trình sin^2x−5sinx+6=0 trên đoạn (0;2π). Chọn câu trả lời đúng?
A. Phương trình có 2 nghiệm.
B. Phương trình có 4 nghiệm.
C. Cả A, B, D đều sai.
D. Phương trình có 3 nghiệm. Đáp án là: C. Cả A, B, D đều sai. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Sắp xếp các chất sau đây theo giảm dần nhiệt độ sôi: CH 3 COOH (1), HCOOCH 3 (2), CH 3 CH 2 COOH (3), CH 3 COOCH 3 (4), CH 3 CH 2 CH 2 OH (5)
A.(3) > (5) > (1) > (2) > (4)
B.(3) > (1) > (5) > (4) > (2)
C.(1) > (3) > (4) > (5) > (2)
D.(3) > (1) > (4) > (5) > (2) Đáp án l... | [
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<s> Chọn đáp án đúng với câu hỏi: Sự nhân đôi ADN ở sinh vật nhân thực có sự khác biệt với sự nhân đôi ADN ở sinh vật nhân sơ về:
A. Chiều tổng hợp.
B. số loại nucleotit tham gia.
C. Số lượng đơn vị tái bản
D. Nguyên tắc nhân đôi. Đáp án là: C. Số lượng đơn vi... | [
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<s> Chọn đáp án đúng với câu hỏi: A hydroelectric dam ______________ in this area now.
A. is building
B. is being built
C. build
D. was built Đáp án là: B. is being built </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Phát hiện ra Ô-xtrây-li-a đầu tiên là người của
A. Pháp.
B. Anh.
C. Đức.
D. Hà Lan. Đáp án là: D. Hà Lan </s> | [
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1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Một huyện có 320ha đất trồng cây cà phê và 480ha đất trồng cây cao su. Hỏi diện tích đất trồng cây cao su bằng bao nhiêu phần trăm diện tích đất trồng cây cà phê
A. 150%
B. 15%
C. 1500%
D. 105% Đáp án là: B. 15% </s> | [
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1,
1,
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1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: O Hen – ri thường viết về đối tượng nào?
A. Tầng lớp tri thức
B. Người dân thành thị
C. Người bất hạnh
D. Người có chức quyền trong xã hội Đáp án là: C. Người bất hạnh </s> | [
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1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Tại hai điểm A,B cách nhau 20cm trong không khí có đặt hai điện tích q 1 = 4.10 - 6 C; q 2 = - 6, 4.10 - 6 C. Lực điện trường tác dụng lên q 3 = - 5.10 - 7 C đặt tại C với AC=12cm, BC=16cm có độ lớn là
A. 1,2N
B. 0,86N
C. 0,94N
D. 0,96N Đáp án là: D. 0,... | [
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1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Trong số các chất dưới đây, chất nào không phải là chất dẫn điện?
A. Than chì
B. Nhựa
C. Gỗ khô
D. Cao su Đáp án là: A. Than chì </s> | [
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1,
1,
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1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Which of the following is considered miserable?
A. A crew on board of the Mars One Mission
B. A score of the programme on the probability scale
C. A personality of people taking part in the programme
D. A mission of astronauts to the ISS Đáp án là: D. A mission of astronauts to the ISS... | [
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8449,
310,
278,
1494,
338,
5545,
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519,
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13,
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2988... | [
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1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Trong mạch dao động LC lí tưởng có dao động điện từ tự do, hiệu điện thế cực đại giữa hai bản tụ là U 0. Khi cường độ dòng điện trong mạch có giá trị bằng 1 4 giá trị cực đại của nó thì hiệu điện thế giữa hai bản tụ là:
A. ... | [
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1,
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1,
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1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Este nào sau đây khi bị thủy phân cho ra một muối duy nhất và một ancol?
A. HO-CH 2 CH 2 COOCH 2 CH 2 COOCH 3
B. CH 3 COOC 6 H 5.
C. CH 3 COOCH 2 COOCH 3.
D. CH 3 COOCH 2 OOCC 2 H 5. Đáp án là: A. HO-CH 2 CH 2 COOCH 2 CH 2 COOCH 3 </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Chỉ dùng 1 chất để phân biệt 3 kim loại sau: Al, Ba, Mg?
A. Dung dịch HCl
B. Nước
C. Dung dịch NaOH
D. Dung dịch H 2 SO 4 Đáp án là: B. Nước </s> | [
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1,
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1,
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1... |
<s> Chọn đáp án đúng với câu hỏi: Mark the letter A, B, C, or D to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions I'm totally exhausted after having finished successive assignments in only a week.
A. jobs
B. works
C. exercises
D. problems Đáp án là: C. exercises </s... | [
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470,
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1,
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1,
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1... |
<s> Chọn đáp án đúng với câu hỏi: So với mặt phẳng quỹ đạo, trục Trái Đất nghiêng một góc
A. 23 0 27’.
B. 56 0 27’.
C. 66 0 33’.
D. 32 0 27’. Đáp án là: C. 66 0 33’. </s> | [
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1,
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1... |
<s> Chọn đáp án đúng với câu hỏi: Một lò xo khối lượng không đáng kể, độ cứng 100 N/m và có chiều dài tự nhiên l = 40 cm. Giữ đầu trên của lò xo cố định và buộc vào đầu dưới của lò xo một vật nặng khối lượng 500 g, sau đó lại buộc thêm vào điểm chính giư... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Biểu thức \[a - (b + c - d) + ( - d) - a\] sau khi bỏ ngoặc là:
A. \[ - b - c\]
B. \[ - b - c - d\]
C. \[ - b - c + 2d\]
D. \[ - b - c - 2d\] Đáp án là: A. \[ - b - c\] </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Vai trò của quan hệ cạnh tranh trong quần thể là
A. tạo cho số lượng và sự phân bố của các cá thể trong quần thể duy trì ở mức độ phù hợp, đảm bảo sự tồn tại và phát triển của quần thể
B. tạo cho số lượng giảm hợp lí va... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Trong không gian với hệ tọa độ Oxyz, cho hình hộp ABCD.A'B'C'D', biết rằng A(−3;0;0),B(0;2;0),D(0;0;1) và A'(1;2;3). Tìm tọa độ điểm C′.
A. C'(10,4,4)
B. C'(-13;4;4)
C. C'(13;4;4)
D. C'(7;4;4) Đáp án là: D.A'B'C'D', biết rằng A(−3;0;0),B(0;2;0),D(0;0;1) và A'(1;2;3) </s> | [
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1,
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<s> Chọn đáp án đúng với câu hỏi: Chất béo là:
A. hợp chất hữu cơ chứa C, H, O, N
B. trieste của axit béo và glixerol
C. là este của axit béo và ancol đa chức
D. trieste của axit hữu cơ và glixerol Đáp án là: B. trieste của axit béo và glixerol </s> | [
1,
1,
29871,
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29876,
29871,
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367,
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425,
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13,... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Mark the letter A, B, C or D on your answer sheet to indicate the word or phrase that is CLOSEST in meaning to the underlined part in each of the following questions. He tried to look for a job that would help him develop his skills
A. advance
B. fill in
C. change
D. grow Đáp án là: A.... | [
1,
1,
29871,
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1715,
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350,
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315,
470,
360,
373,
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1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: The passage would most likely be followed by details about _______.
A. automated freeways
B. pollution restrictions in the future
C. the neighborhood of the future
D. electric shuttle buses Đáp án là: A. automated freeways </s> | [
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450,
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367,
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491,
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1048,
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7652,... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Người sáng lập Công hội bí mật đầu tiên tại Sài Gòn-Chợ Lớn năm 1920 là
A. Ngô Gia Tự.
B. Tôn Đức Thắng.
C. Phan Văn Trường.
D. Trần Văn Giàu. Đáp án là: B. Tôn Đức Thắng. </s> | [
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1,
1,
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1,
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1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Dưới tác dụng của chỉ một lực có hướng thay đổi nhưng có độ lớn không đổi, chất điểm có thể chuyển động với
A. Véc tơ vận tốc không đổi.
B. Tốc độ không đổi.
C. Với quỹ đaoc thẳng.
D. Véc tơ gia tốc không đổi. Đáp án là... | [
1,
1,
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678,
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1715,
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865,
325,
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5334,
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207,
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11062,
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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: Cho các quần thể sau: (1) Quần thể bắp trên một cánh đồng. (2) Quần thể vi khuẩn cùng loài nuôi cấy trong một đĩa thủy tinh. (3) Quần thể ong thợ (đơn tính) trong một vườn hoa. (4) Quần thể đậu Hà Lan trong mô hình thí nghiệm củ... | [
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3150... | [
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1,
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1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: ______ the damaging effect of cars are now well-recognized, the number of cars on the road continues to grow every year.
A. If
B. As if
C. If only
D. Even if Đáp án là: D. Even if </s> | [
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1,
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903,
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278,
5625,
6751,
2779,
310,
18647,
526,
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153... | [
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1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Công thức tính giá trị trung bình đối với bảng phân bố tần số rời rạc là:
A. x ̄=(n_1x_1+n_2x_2+...+n_kx_k)/(n^2)
B. x ̄=(n_1x_1+n_2x_2+...+n_kx_k)/(n)
C. x ̄=n_1x_1+n_2x_2+...+n_kx_k
D. x ̄=n(n_1x_1+n_2x_2+...+n_kx_k) Đáp án là: B. x ̄=(n_1x_1+n_2x_2+...+n_kx_k)/(n) </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Nung nóng từng cặp chất sau trong bình kín: (1) H 2 (k) + CuO(r) ; (2) C (r) + KClO 3 ; (3) Fe (r) + O 2 (r) (4) Mg ( r ) + SO 2 (k) ; (5) Cl 2 (k) + O 2 (k); (6) K 2 O ( r ) + CO 2 (k) Số trường hợp có phản ứng hóa học xảy ra là:
A. 4
B. 2
C. 3
D. 5 Đáp án là: ... | [
1,
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31214,... | [
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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: Trong các polime sau: xenlulozơ, nhựa phenol-foman đ ehit, xenlulozơ nitrat, mủ sao su. Polime tổng hợp là :
A. x enlulozơ.
B. c ao su
C. x enlulozơ nitrat.
D. n hựa phenol-foman đ ehit. Đáp án là: D. n hựa phenol-foman đ ehit </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Tác giả Trần Cư tên thật là gì?
A. Nguyễn Ngọc Cư
B. Nguyễn Văn Cư
C. Trần Văn Cư
D. Trần Ngọc Cư Đáp án là: D. Trần Ngọc Cư </s> | [
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1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Tổng thống Gooc – ba – chốp lên nắm quyền lãnh đạo và đề ra đường lối cải tổ ở Liên Xô vào thời gian nào?
A.3/1985
B. 3/1986
C. 2/1985
D. 2/1986 Đáp án là: A.3/1985 </s> | [
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1,
1... |
<s> Chọn đáp án đúng với câu hỏi: LB Nga tiếp giáp với hai đại dương nào sau đây?
A. Thái Bình Dương và Đại Tây Dương.
B. Đại Tây Dương và Ấn Độ Dương.
C. Ấn Độ Dương và Thái Bình Dương.
D. Thái Bình Dương và Bắc Băng Dương. Đáp án là: D. Thái Bình Dương và Bắc ... | [
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1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Mạch dao động lý tưởng gồm cuộn cảm thuần có độ tự cảm L không đổi và có tụ điện có điện dung C thay đổi được. Khi C = C 1 thì tần số dao động riêng của mạch bằng 30 kHz và khi C = C 2 thì tần số dao động riêng của mạch bằng ... | [
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,
3219,
31214,
305,
1146,
29877,
29871,
30128,
29877,
31214,
31500,
865... | [
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,
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: Choose the letter A, B, C or D the word that has the underlined part different from others.
A. pre s ident
B. s ection
C. s tele
D. e s tablish Đáp án là: A. pre s ident </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,
14542,
852,
278,
5497,
319,
29892,
350,
29892,
315,
470,
360,
278,
... | [
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,
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: Cho các phát biểu sau: (a) Anđehit chỉ có tính khử. (b) Phenol tham gia phản ứng thế brom dễ hơn benzen. (c) Xeton tác dụng với H 2 (dư) có xúc tác Ni đun nóng, thu được ancol bậc một. (d) Dung dịch axit axetic tác dụng được với Cu ( OH ) 2. (e)... | [
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,
14542,
5777,
30103,
29883,
1374,
29874,
30103,
29873,
289,
347,
31500... | [
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,
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: Ý nào sau đây không đúng với quần đảo Ha – Oai của Hoa Kì?
A. Nằm giữa Thái Bình Dương.
B. Có tiềm năng rất lớn về du lịch.
C. Có trữ lượng lớn về dầu mỏ, khí tự nhiên.
D. Có tiềm năng rất lớn về hải sản. Đáp án là: C. Có tru... | [
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,
612,
30103,
1055,
30712,
29877,
12507,
29871,
30128,
29874,
31500,
29... | [
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,
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... |
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