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<s> Chọn đáp án đúng với câu hỏi: Choose the answer (a, b, c or d) that is nearest in meaning to the printed before it. 'You're always making terrible mistakes,' said the teacher.
A. The teacher complained about his students making terrible mistakes.
B. The teacher asked his students why they always made terrible mistakes.
C. The teacher realized that his students always made terrible mistakes.
D. The teacher made his students not always make terrible mistakes. Đáp án là: A. The teacher complained about his students making terrible mistakes. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Khi muối dưa chua, cần nén chặt để dưa cải không nổi lên mặt nước nhằm
A. tạo điều kiện yếm khí cho vi khuẩn lactic phát triển.
B. tạo điều kiện thoáng khí cho vi khuẩn lactic phát triển.
C. tạo điều kiện để dưa cải thành phẩm có độ mặn đồng đều.
D. tạo điều kiện để dưa cải thành phẩm có độ giòn hơn. Đáp án là: C. tạo điều kiện để dưa cải thành phẩm có độ mặn đồng đều. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho dung dịch các chất: Ca(HCO 3 ) 2, NaOH, (NH 4 ) 2 CO 3, KHSO 4, BaCl 2. Ở điều kiện thường khi trộn từng cặp 2 chất với nhau. Số cặp chất xảy ra phản ứng là
A. 6
B. 7
C. 8
D. 9 Đáp án là: C. 8 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Indicate the word whose underlined part differs from the other three in pronunciation:
A. l i tter
B. appl i ance
C. d i ssolve
D. i nnovate Đáp án là: B. appl i ance </s> | [
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<s> Chọn đáp án đúng với câu hỏi: He is ___________ to have good friends.
A. enough lucky
B. lucky enough
C. luckily enough
D. enough unlucky Đáp án là: B. lucky enough </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một tế bào sinh tinh có kiểu gen A B a b D d khi giảm phân không xảy ra hoán vị gen sẽ cho tối đa bao nhiêu loại giao tử?
A. 1.
B. 3.
C. 4
D. 2. Đáp án là: D. 2 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Gieo một con xúc xắc hai lần, xác suất để biến cố tích hai số chấm xuất hiện khi gieo xúc xắc là một số chẵn là:
A. 0,25;
B. 0,5;
C. 0,75;
D. 0,85. Đáp án là: C. 0,75; </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Các cặp chất tác dụng được với nhau là:
A. Na 2 O và SO 2, CaO và H 2 CO 3.
B. PbO và H 2 O, BaO và SO 2.
C. CuO và BaO, P 2 O 5 và KOH.
D. MgO và H 2 O, NaOH và CO 2. Đáp án là: A. Na 2 O và SO 2, CaO và H 2 CO 3. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Where can I get a cup of coffee?’ ‘_______’.
A. No sugar, please.
B. I’d like coffee.
C. There’s a cafeteria downstairs
D. I’m thirsty. Đáp án là: A. No sugar, please. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Tác dụng của biện pháp điệp từ trong khổ thơ thứ 4 là gì?
A. Nhấn mạnh vẻ đẹp của tình yêu tuổi học trò.
B. Nhấn mạnh tình yêu của chủ thể trữ tình.
C. Nhấn mạnh những nỗi nhớ của chủ thể trữ tình.
D. Đáp án khác. Đáp án là: C. Nhấn mạnh những nỗi nhớ của chủ thể trữ tình. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Hiện tượng hồ quang điện được ứng dụng:
A. Trong kĩ thuật hàn điện
B. Trong kĩ thuật mạ điện
C. Trong điốt bán dẫn
D. Trong ống phóng điện tử Đáp án là: A. Trong kĩ thuật hàn điện </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Thuỷ phân hoàn toàn 8,8 gam este đơn chức, mạch hở X với 100 ml dung dịch KOH 1M (vừa đủ) thu được 4,6 gam một ancol Y. Tên gọi của X là :
A. etyl propionat
B. etyl fomat
C. etyl axetat
D. propyl axetat Đáp án là: C. etyl axetat </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Hỗn hợp X gồm axit panmitic, axit stearic và axit linoleic. Để trung hòa m gam X cần 40 ml dung dịch NaOH 1M. Mặt khác, nếu đốt cháy hoàn toàn m gam X thì thu được 15,232 lít khí CO 2 (đktc) và 11,7 gam H 2 O. Phần trăm số mol của axit linoleic trong m gam hỗn hợp X là
A. 37,5%
B. 75%
C. 50%
D. 40% Đáp án là: A. 37,5% </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một người công nhân có khối lượng 60kg nhảy ra từ một chiếc xe gòng có khối lượng 100kg đang chạy theo phưong ngang với vận tốc 3m/s, vận tốc nhảy của người đó đối với xe là 4m/s. Tính vận tốc của xe sau khi người công nhân nhảy cùng chiều với xe.
A. 0,4m /s
B. 0,8 m/s
C. 0,6 m/s
D. 0, 5 m/s Đáp án là: C. 0,6 m/s </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một hỗn hợp Y gồm CH 3 OH, CH 3 COOH, C 6 H 5 OH tác dụng vừa đủ với Na sinh ra 672ml khí (đktc) và hỗn hợp rắn X. Nếu đốt cháy hết Y thu được 4,032 lit CO 2 (đktc). Nếu đốt cháy hết X thì số mol CO 2 tạo ra là
A. 0,15
B. 0,16
C. 0,18
D. 0,12 Đáp án là: A. 0,15 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Ở một loài thực vật lưỡng bội, alen A qui định thân cao trội hoàn toàn so với alen a qui định thân thấp; alen B qui định hoa đỏ trội hoàn toàn so với alen b qui định hoa trắng, các gen phân li độc lập. Biết không xảy ra đột biến. Theo lí thuyết, có bao nhiêu phát biểu sau đây đúng? I. Cho cây AaBb lai phân tích thì đời con có số kiểu hình bằng số kiểu gen. II. Cho cây thân cao, hoa trắng tự thụ phấn, nếu đời F1 có 2 loại kiểu hình thì chứng tỏ có 3 loại kiểu gen. III. Cho cây thân thấp, hoa đỏ (P) tự thụ phấn, thu được F 1. Nếu F 1 có thân thấp, hoa trắng thì chứng tỏ F 1 có 3 loại kiểu gen. IV. Các cây thân cao, hoa trắng giao phấn ngẫu nhiên thì đời con có tối thiểu 1 kiểu gen.
A. 1
B. 3
C. 2
D. 4 Đáp án là: D. 4 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Biết suất đàn hồi của dây bằng kim loại đường kính 1mm là 9.10 10 Pa. Độ lớn lực kéo tác dụng làm dây dài ra thêm 1% so với chiều dài ban đầu là:
A. F = 550 (N)
B. F = 200 π (N)
C. F = 225π (N)
D. F = 735 (N) Đáp án là: C. F = 225π (N) </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Căn cứ vào Atlat Địa lí Việt Nam trang 22, hãy cho biết trung tâm công nghiệp nào sau đây có ngành công nghiệp dệt may?
A. Thanh Hóa
B. Phúc Yên
C. Hà Nội
D. Hạ Long Đáp án là: C. Hà Nội </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Nguyên nhân trực tiếp bùng nổ cuộc cách mạng tư sản Pháp là gì?
A. Sự kiện “chè Bô-xton”.
B. Sự kiện phá ngục Ba-xti.
C. Sự kiện vua Lu-i XVI triệu tập hội nghị ba đẳng cấp.
D. Sự kiện vua Lu-I bị bắt. Đáp án là: B. Sự kiện phá ngục Ba-xti. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Thế nào là tiêu hoá thức ăn?
A. Biến đổi thức ăn thành các chất dinh dưỡng
B. Cơ thể hấp thụ chất dinh dưỡng qua thành ruột
C. Thải bỏ các chất thừa không hấp thụ được
D. Cả A, B và C Đáp án là: D. Cả A, B và C </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho các phát biểu sau: (a) Trong bảng tuần hoàn các nguyên tố hóa học, crom thuộc nhóm VIIIB. (b) Crom không tác dụng với dung dịch axit HNO 3 và H 2 SO 4 đặc nguội. (c) Khi thêm dung dịch kiềm vào muối cromat sẽ tạo thành đicromat. (d) Trong môi trường axit, muối crom(VI) bị khử thành muối crom(III). (e) CrO là oxit bazơ, Cr 2 O 3 là oxit lưỡng tính, CrO 3 là oxit axit. (g) CuO nung nóng khi tác dụng với NH 3 hoặc CO đều thu được Cu. (h) Lưu huỳnh, photpho, ancol etylic đều bốc cháy khi tiếp xúc với CrO 3. Số phát biểu đúng là
A. 5
B. 6
C. 4
D. 7 Đáp án là: A. 5 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Khi nói về đột biến cấu trúc nhiễm sắc thể, phát biểu nào sau đây đúng?
A. Đột biến đảo đoạn làm cho gen từ nhóm gen liên kết này chuyển sang nhóm gen liên kết khác
B. Đột biến cấu trúc nhiễm sắc thể chỉ xảy ra ở nhiễm sắc thể thường và không xảy ra ở nhiễm sắc thể giới tính
C. Đột biến lặp đoạn kết hợp với đột biến gen có vai trò quan trọng trong việc tạo nên các gen mới
D. Đột biến đảo đoạn làm tăng số lượng gen trên nhiễm sắc thể Đáp án là: C. Đột biến lặp đoạn kết hợp với đột biến gen có vai trò quan trọng trong việc tạo nên các gen mới </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Tìm số tự nhiên x, biết: (x – 5). 1 000 = 0.
A.x = 5
B.x = 1 000
C.x = 7
D.x = 5 000 Đáp án là: A.x = 5 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Lựa chọn đáp án đúng nhất:Cho hình lập phương có cạnh bằng của 15 cm. Tính thể tích của hình lập phương đó.
A. 1725 cm^3
B. 1726 cm^3
C. 1727 cm^3
D. 1728 cm^3 Đáp án là: D. 1728 cm^3 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một khung dây mang dòng điện I đặt trong từ trường đều, mặt phẳng khung dây vuông góc với đường cảm ứng từ (Hình vẽ). Kết luận nào sau đây là đúng về lực từ tác dụng lên các cạnh của khung dây
A. bằng không
B. có phương vuông góc với mặt phẳng khung dây
C. nằm trong mặt phẳng khung dây, vuông góc với các cạnh và có tác dụng kéo dãn khung
D. nằm trong mặt phẳng khung dây, vuông góc với các cạnh và có tác dụng nén khung Đáp án là: C. nằm trong mặt phẳng khung dây, vuông góc với các cạnh và có tác dụng kéo dãn khung </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Tìm các số tự nhiên a,b,ca,b,c sao cho 228 ≤ a< b< c ≤ 230.
A. a = 228; b = 229; c = 230
B. a = 227; b = 228; c = 229
C. a = 229; b = 230; c = 231
D. Không tồn tại a; b; c thỏa mãn đề bài. Đáp án là: A. a = 228; b = 229; c = 230 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Phát biểu nào sau đây đúng?
A. Lực đẩy Ác-si-mét tác dụng lên một vật nhúng trong chất lỏng bằng trọng lượng của vật
B. Lực đẩy Ác-si-mét tác dụng lên một vật nhúng trong chất lỏng bằng trọng lượng của chất lỏng
C. Lực đẩy Ác-si-mét tác dụng lên một vật nhúng trong chất lỏng bằng trọng lượng phần chất lỏng bị vật chiếm chỗ
D. Lực đẩy Ác-si-mét tác dụng lên một vật nhúng trong chất lỏng bằng trọng lượng của phần vật nằm dưới mặt chất lỏng Đáp án là: C. Lực đẩy Ác-si-mét tác dụng lên một vật nhúng trong chất lỏng bằng trọng lượng phần chất lỏng bị vật chiếm chỗ </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Rewrite sentences without changing the meaning No one in the class is more intelligent than Long.
A. Long is the most intelligent student in the class.
B. Every student in the class is more intelligent than Long.
C. Long is not intelligent at all.
D. The least intelligent student in the class is Long. Đáp án là: A. Long is the most intelligent student in the class. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Trên bề mặt chất lỏng có hai nguồn kết hợp A và B cách nhau 50 cm dao động cùng pha, cùng chu kì T = 0,2 s. Biết tốc độ truyền sóng trên mặt chất lỏng v = 40 cm/s. Xét điểm M nằm trên đường thẳng vuông góc với AB tại B. Biết phần tử chất lỏng tại M dao động với biên độ cực đại, M cách B một đoạn nhỏ nhất bằng
A. 2cm
B. 2,04 cm
C. 2,5 cm
D. 2,3 cm Đáp án là: B. Biết phần tử chất lỏng tại M dao động với biên độ cực đại, M cách B một đoạn nhỏ nhất bằngA. 2cm </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Do you remember Daisy? I ran _______ her at the Fair yesterday.
A. by
B. down
C. across
D. in Đáp án là: C. across </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Các biện pháp tu từ có trong đoạn thơ trên?
A.Nhân hóa, so sánh
B.Ẩn dụ, điệp từ, liệt kê
C.Hoán dụ, so sánh
D.So sánh, điệp từ Đáp án là: B.Ẩn dụ, điệp từ, liệt kê </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Minh trong 5 phút thực hiện một công cơ học là 9000J, vậy công suất của bạn Minh là:
A. 30W.
B. 300W.
C. 1800W.
D. 45kW. Đáp án là: A. 30W. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Thắng lợi của cuộc kháng chiến chống Pháp của nhân dân Việt Nam đã cổ vũ mạnh mẽ phong trào giải phóng dân tộc ở
A. châu Á.
B. châu Phi, khu vực Mĩ Latinh.
C. cả châu Á, châu Phi và khu vực Mĩ Latinh.
D. trên toàn thế giới. Đáp án là: C. cả châu Á, châu Phi và khu vực Mĩ Latinh. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Điểm khác biệt cơ bản giữa nhiệm vụ của cách mạng tư sản Pháp cuối thế kỉ XVIII với các cuộc cách mạng tư sản trước đó là:
A. Thực hiện đồng thời hai nhiệm vụ đấu tranh chống lại các thế lực phong kiến trong nước và bên ngoài
B. Chống lại liên minh phong kiến châu Âu để bảo vệ thành quả cách mạng
C. Phải thực hiện khẩu hiệu hòa bình- ruộng đất- bánh mì cho quần chúng
D. Phải thiết lập nền chuyên chính dân chủ Đáp án là: A. Thực hiện đồng thời hai nhiệm vụ đấu tranh chống lại các thế lực phong kiến trong nước và bên ngoài </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Trong các thiết bị, pin quang điện, quang điện trở, tế bào quang điện, ống tia X, có hai thiết bị mà nguyên tắc hoạt động dựa trên cùng một hiện tượng vật lí, đó là
A. tế bào quang điện và ống tia X.
B. tế bào quang điện và quang điện trở.
C. pin quang điện và quang điện trở.
D. pin quang điện và tế bào quang điện. Đáp án là: C. pin quang điện và quang điện trở. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Suốt từ thế kỉ X - XIV, dân cư ở vùng đất Nam Bộ
A. rất đông đúc.
B. rất thưa thớt.
C. buôn bán nhộn nhịp.
D. rất giàu có. Đáp án là: B. rất thưa thớt. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: All the children have gone ________ mumps.
A. along with
B. down with
C. out with
D. through with Đáp án là: B. down with </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cô giáo có 18 cái nhãn vở. Cô chia đều cho 3 bạn. Hỏi mỗi bạn có bao nhiêu cái nhãn vở?
A. 5 nhãn vở.
B. 6 nhãn vở.
C. 7 nhãn vở.
D. 8 nhãn vở. Đáp án là: B. 6 nhãn vở. </s> | [
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274,
2997... | [
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<s> Chọn đáp án đúng với câu hỏi: Nhân tố nào ảnh hưởng đến sự phát triển và phân bố ngành giao thông vận tải?
A. Điều kiện tự nhiên
B. Điều kiện kinh tế- xã hội
C. Ý A và B đúng
D. Ý A và B sai Đáp án là: C. Ý A và B đúng </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Choose the word, phrase or expression which best completes each sentence Peter: “ I’ve got to go, Betty. So long." Betty: ” So long, Peter. And __________ ”
A. be careful
B. don’t hurry
C. take care
D. don’t take Đáp án là: C. take care </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Hòa tan hết hỗn hợp 3 kim loại Al, Zn, Mg trong dung dịch HNO 3 loãng vừa đủ, thu được dung dịch X và không thấy khí thoát ra. Cô cạn dung dịch X, thu được m gam muối khan (trong đó O chiếm 61,364% về khối lượng). Nung m gam muối khan nói trên với khối lượng không đối, thu được 19,2 gam chất rắn. Giá trị của m gần nhất giá trị nào sau đây?
A. 65.
B. 70.
C. 75.
D. 80. Đáp án là: B. 70. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Giá trị của biểu thức Q=(3/4−3/5+3/7+3/11)/(13/4−13/5+13/7+13/11) bằng:
A. 13/3
B. (-3)/13
C. 3/13
D. 5/13 Đáp án là: C. 3/13 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cây cà chua ra hoa khi đạt được đến lá thứ?
A. 14
B. 15
C. 12
D. 13 Đáp án là: A. 14 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Hoạt động kinh tế chủ yếu của quần cư nông thôn là
A. sản xuất công nghiệp.
B. sản xuất dịch vụ.
C. sản xuất nông nghiệp.
D. các hoạt động thương mại. Đáp án là: C. sản xuất nông nghiệp. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: When I came to visit him, the doctor ______ away.
A. goes
B. has gone
C. had gone
D. was going Đáp án là: C. had gone </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Chỉ tiêu nào sau đây không đúng với các nước phát triển.
A. GNI/người ở mức cao.
B. HDI ở mức cao trở lên.
C. Trong GDP, ngành dịch vụ có tỉ trọng thấp nhất.
D. Trong GDP, ngành nông nghiệp có tỉ trọng thấp nhất. Đáp án là: C. Trong GDP, ngành dịch vụ có tỉ trọng thấp nhất. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Câu trả lời nào không đúng cho câu hỏi sau: Cầu Long Biên là chứng nhân lịch sử cho những sự kiện nào?
A. Cách mạng tháng Tám thành công tại Hà Nội
B. Những ngày đầu năm 1947, Trung đoàn thủ đô bí mật ra đi
C. Chiến thắng Điện Biên Phủ 1954
D. Chiến thắng Điện Biên Phủ trên không 1972 Đáp án là: C. Chiến thắng Điện Biên Phủ 1954 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Mark the letter A, B, C, or D to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions. Mercury is the sun's swiftest planet. Its orbital period around the sun is only about 88 Earth days.
A. hottest
B. smallest
C. slowest
D. fastest Đáp án là: C. slowest </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Tính giá trị của biểu thức P=(1−2cos2α)(2+3cos2α) biết sinα=2/3
A. P=49/27
B. P=50/27
C. P=48/27
D. P=47/27 Đáp án là: A. P=49/27 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cách đặt phép tính nào dưới đây là đúng?
A. −45 783 25 734 ̄
B. − 45 783 25 734 ̄
C. −45 783 25 734 ̄
D. − (45 783)/25734/ Đáp án là: C. −45 783 25 734 ̄ </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một nguồn phát sóng cơ dao động với phương trình u = 4 cos 4 π t - π 4 c m. Biết dao động tại hai điểm gần nhau nhất trên cùng một phương truyền sóng cách nhau 0,5m có độ lệch pha là π 3. Tốc độ truyền của sóng đó là
A. 1,0 m/s.
B. 2,0 m/s.
C. 1,5 m/s.
D. 6,0 m/s. Đáp án là: D. 6,0 m/s </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho dãy các chất: Al(OH) 3, Zn(OH ) 2, NaH C O 3, NaAlO 2, (NH 4 ) 2 CO 3, Na 2 S O 4. Số chất trong dãy vừa phản ứng đư ợ c với dung d ị ch HCl, vừa p h ản ứng đư ợ c với dung d ị ch NaOH là
A. 4.
B. 2.
C. 3.
D. 5. Đáp án là: A. 4. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Chùm tia sáng đi qua thấu kính hội tụ mô tả hiện tượng
A. Truyền thẳng ánh sáng.
B. Tán xạ ánh sáng.
C. Phản xạ ánh sáng.
D. Khúc xạ ánh sáng. Đáp án là: D. Khúc xạ ánh sáng </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho bốn hỗn hợp, mỗi hỗn hợp gồm hai chất rắn có số mol bằng nhau: Na 2 O và Al 2 O 3, Cu và FeCl 2, BaCl 2 và CuSO 4, Ba và NaHCO 3. Số hỗn hợp có thể tan hoàn toàn trong nước (dư) chỉ tạo ra dung dịch là
A. 4
B. 2
C. 1
D. 3 Đáp án là: C. 1 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Hãy cho biết phản ứng nào sau đây không đúng?
A. K 2 Cr 2 O 7 + 2 KOH → 2 K 2 Cr 2 O 4 + H 2 O
B. K 2 Cr 2 O 7 + H 2 SO 4 đặc → K 2 Cr 2 O 4 + 2 CrO 3 + H 3 O
C. 2 K 2 Cr 2 O 4 + H 2 SO 4 loãng → K 2 Cr 2 O 7 + K 2 SO 4
D. 2 K 2 Cr 2 O 4 + 2 HCl đặc → K 2 Cr 2 O 7 + 2 KCl + H 2 O Đáp án là: D. 2 K 2 Cr 2 O 4 + 2 HCl đặc → K 2 Cr 2 O 7 + 2 KCl + H 2 O </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Khi nói về mức sinh sản và mức tử vong của quần thể, phát biểu nào sau đây sai?
A. Sự thay đổi về mức sinh sản và mức tử vong là cơ chế chủ yếu điều chỉnh số lượng cá thể của quần thể
B. Mức sinh sản của một quần thể động vật chỉ phụ thuộc vào số lượng trứng (hay con non) của mỗi lứa đẻ.
C. Mức sinh sản của quần thể thường giảm khi điều kiện sống không thuận lợi như thiếu thức ăn, điều kiện khí hậu thay đổi bất thường.
D. Mức tử vong của quần thể phụ thuộc vào trạng thái của quần thể, các điều kiện sống của môi trường và mức độ khai thác của con người. Đáp án là: B. Mức sinh sản của một quần thể động vật chỉ phụ thuộc vào số lượng trứng (hay con non) của mỗi lứa đẻ. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Đọan trích Lời tiễn dặn thể hiện tâm trạng gì?
A. Tâm trạng của cô gái khi tiễn dặn.
B. Tâm trạng của người chồng khi tiễn dặn.
C. Tâm trạng của chàng trai khi tiễn dặn.
D. Tâm trạng của con rồng, con phượng khi tiễn dặn. Đáp án là: C. Tâm trạng của chàng trai khi tiễn dặn. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Chọn câu phát biểu đúng?
A. Ảnh của vật nhìn qua kính hiển vi là ảnh ảo ngược chiều với vật.
B. Ảnh của vật nhìn qua kính thiên văn ngược chiều và lớn hơn vật.
C. Khoảng cách giữa vật kính và thị kính của kính hiển vi thay đổi được.
D. Khoảng cách giữa vật kính và thị kính của kính thiên văn không thay đổi được. Đáp án là: A. Ảnh của vật nhìn qua kính hiển vi là ảnh ảo ngược chiều với vật. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Sự kiện nào diễn ra ở miền Nam có tính chất mở đầu cho việc đánh bại Chiến tranh đặc biệt của Mĩ?
A. Chiến thắng Ba Gia (Quảng Ngãi).
B. Chiến thắng Đồng Xoài (Biên Hòa)
C. Chiến tháng Ấp Bắc (Mĩ Tho).
D. Chiến thắng An Lão (Bình Định). Đáp án là: C. Chiến tháng Ấp Bắc (Mĩ Tho). </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Mark the letter A, B, C or D on your answer sheets to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.
A. comment
B. development
C. confedince
D. reference Đáp án là: A. comment </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Ranh giới tự nhiên giữa châu Á với châu Âu là
A. Sông Ô-bi.
B. Dãy U-ran.
C. Biển Địa Trung Hải.
D. Dãy Cap-ca. Đáp án là: B. Dãy U-ran. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Trong khai triển (2x – 1)^10 hệ số của số hạng chứa x^8 là:
A. – 11520;
B. 45;
C. 256;
D. 11520. Đáp án là: D. 11520 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Khi cho kim loại tác dụng với HNO 3 thì không thể tạo ra hợp chất
A. N 2 O 5
B. NH 4 NO 3
C. NO 2
D. NO Đáp án là: A. N 2 O 5 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Theo quy hoạch của Bộ Công nghiệp (năm 2001), vùng công nghiệp 4 bao gồm các tỉnh
A. Đông Nam Bộ và Bình Thuận, Lâm Đồng.
B. thuộc Tây Nguyên (trừ Lâm Đồng).
C. từ Quảng Bình đến Ninh Thuận.
D. thuộc Đông bằng sông Cửu Long. Đáp án là: B. thuộc Tây Nguyên (trừ Lâm Đồng). </s> | [
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450,
29877,
439,
29891,
5089,
29874,
31214,
305,
2723,
207,
140,
29... | [
1,
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<s> Chọn đáp án đúng với câu hỏi: CH 3 COOC 2 H 3 phản ứng với chất nào sau đây tạo ra được este no?
A. SO 2
B. KOH
C. HCl
D. H 2 (Ni, t 0 ) Đáp án là: D. H 2 (Ni, t 0 ) </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho dãy các chất sau: vinyl fomat, metyl acrylat, glucozơ, saccarozơ, etylamin, alanin. Phát biểu nào sau đây sai?
A. Có 2 chất tham gia phản ứng tráng bạc
B. Có 3 chất bị thủy phân trong môi trường kiềm
C. Có 3 chất hữu cơ đơn chức, mạch hở
D. Có 3 chất làm mất màu nước brom Đáp án là: C. Có 3 chất hữu cơ đơn chức, mạch hở </s> | [
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<s> Chọn đáp án đúng với câu hỏi: When.........................Maryam?
A. were you last seeing
B. were you last see
C. do you last see
D. did you last see Đáp án là: D. did you last see </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Thuốc thử dùng để phân biệt các dung dịch riêng biệt, mất nhãn: NaCl, HCl, NaHSO 4, Na 2 CO 3 là
A. KNO 3.
B. NaOH.
C. BaCl 2.
D. NH 4 Cl. Đáp án là: C. BaCl 2. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Africa is large. Asia is larger.
A. Asia is largest than Africa.
B. Africa is larger than Asia.
C. Asia is larger than Africa.
D. Africa is largest than Asia. Đáp án là: C. Asia is larger than Africa. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Ba thanh sắt, đồng và nhôm ở nhiệt độ 20 0 C có kích thước giống nhau. Nếu hạ nhiệt độ của chúng xuống 0 0 C khi đó:
A. Kích thước của thanh nhôm lớn nhất.
B. Kích thước của thanh đồng lớn nhất.
C. Kích thước của thanh sắt lớn nhất.
D. Kích thước của 3 thanh như nhau Đáp án là: C. Kích thước của thanh sắt lớn nhất. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Thành tựu nào sau đây là ứng dụng của công nghệ tế bào?
A. Tạo chủng vi khuẩn E. coli sản xuất insulin của người
B. Tạo giống bông và giống đậu tương mang gen kháng thuốc diệt cỏ của thuốc lá cảnh Petunia
C. Tạo giống lúa “gạo vàng” có khả năng tổng hợp p-carôten (tiền vitamin A) trong hạt
D. Tạo giống pomato từ khoai tây và cà chua. Đáp án là: D. Tạo giống pomato từ khoai tây và cà chua </s> | [
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<s> Chọn đáp án đúng với câu hỏi: the dunes never (17) _________the same. The scenery is more fascinating at dawn.
A. look
B. look at
C. look like
D. look for Đáp án là: A. look </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Trong các phát biểu sau, phát biểu nào sai
A. Hình bình hành có 1 trục đối xứng
B. Đoạn thẳng có 2 trục đối xứng
C. Hình vuông có 4 trục đối xứng
D. Tam giác cân có 1 trục đối xứng Đáp án là: A. Hình bình hành có 1 trục đối xứng </s> | [
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<s> Chọn đáp án đúng với câu hỏi: The phrase to have a Miss World appearance means _______.
A. to become a Miss World
B. to enter a beauty contest
C. to be intelligent
D. to be beautiful Đáp án là: A. to become a Miss World </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Ann: “More coffee? Anybody?” Brian: “_________________”
A. I don’t agree, I’m afraid.
B. It’s right I think.
C. I’d love to.
D. Yes, please. Đáp án là: D. Yes, please </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Thể tích của 0,54 gam H 2 ở điều kiện tiêu chuẩn là
A. 6,048 l
B. 8,604 l
C. 5,122 l
D. 2,45 l Đáp án là: A. 6,048 l </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Đánh giá độ dinh dưỡng của phân lân bằng hàm lượng %:
A. P 2 O 5.
B. P.
C. PO 4 3-.
D. H 3 PO 4. Đáp án là: A. P 2 O 5. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Nhận xét nào sau đây là đúng
A. Số thứ tự nhóm A bằng số electron hóa trị
B. Số thứ tự chu kì bằng số electron hóa trị
C. Số nguyên tố ở chu kì 3 là 18
D. Trong bảng tuần hoàn, số chu kì nhỏ bằng 2 Đáp án là: A. Số thứ tự nhóm A bằng số electron hóa trị </s> | [
1,
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<s> Chọn đáp án đúng với câu hỏi: Your phone ________ off before you enter the exam room.
A. must be turned
B. must be turning
C. must turn
D. be turned Đáp án là: A. must be turned </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cầu chì có tác dụng:
A. Làm cho mạch dẫn điện tốt
B. Làm giảm bớt cường độ dòng điện trong mạch
C. Tự động ngắt mạch khi có hiện tượng đoản mạch
D. Đóng mở công tắc dễ dàng Đáp án là: C. Tự động ngắt mạch khi có hiện tượng đoản mạch </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Điểm chung trong nội dung phản ánh của hai đoạn trích dẫn sau là gì? “Sử để ghi việc, mà việc hay hoặc dở đều dùng làm gương răn cho đời sau”. (Ngô Sỹ Liên và các sử thần nhà Lê, Đại Việt sử ký toàn thư, Tập I, Sđd, tr. 101) “Dân ta phải biết sử ta/ Cho tường gốc tích nước nhà Việt Nam”. ( Hồ Chí Minh, Lịch sử nước ta, 1942)
A. Sử được dùng làm gương răn dạy cho đời sau.
B. Vai trò, ý nghĩa của tri thức lịch sử đối với cuộc sống.
C. Người Việt Nam cần phải hiểu biết về lịch sử Việt Nam.
D. Người Việt Nam cần phải tường tận về gốc tích của mình. Đáp án là: B. Vai trò, ý nghĩa của tri thức lịch sử đối với cuộc sống. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Hiện tượng nào sau đây là biểu hiện của mối quan hệ hỗ trợ cùng loài?
A. Động vật cùng loài ăn thịt lẫn nhau.
B. Tỉa thưa tự nhiên ở thực vật
C. Cá mập con khi mói nở, sử dụng trứng chưa nở làm thức ăn.
D. Các cây thông mọc gần nhau, có rễ nối liền nhau. Đáp án là: D. Các cây thông mọc gần nhau, có rễ nối liền nhau </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Tổng nào sau đây có giá trị lớn nhất
A. 39 + 5
B. 25 + 9
C. 29 + 7
D. 37 + 9 Đáp án là: D. 37 + 9 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Kết quả của phép tính 9 × 7 + 38 là:
A. 101 B. 100 C. 99 D. 98
A. 101
B. 100
C. 99
D. 98 Đáp án là: A. 101 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Tia X là sóng điện từ có
A. tần số lớn hơn tần số của tia tử ngoại.
B. tần số nhỏ hơn tần số của tia tử ngoại.
C. bước sóng lớn hơn bước sóng của tia tử ngoại.
D. bước sóng lớn hơn 380 nm. Đáp án là: A. tần số lớn hơn tần số của tia tử ngoại. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Liên minh phát xít được hình thành trong những năm 30 của thế kỉ XX còn được gọi là
A. phe Liên minh.
B. phe Hiệp ước.
C. phe Trục.
D. phe Đồng minh. Đáp án là: C. phe Trục. </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 sentence that best completes each of the following exchanges. Student A: “You sing beautifully. You should join the school choir.” Student B: “______________”
A. Eek, no way!
B. Aha, I’ll think about it.
C. Hmm, I’m not sure.
D. Really? I don’t believe it. Đáp án là: C. Hmm, I’m not sure. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Rút gọn phân số \[\frac{{\left( { - 2} \right).3 + 6.5}}{{9.6}}\]về dạng phân số tối giản ta được phân số có tử số là
A. \[\frac{4}{9}\]
A.
B. 31
C. – 1
D. 4 Đáp án là: D. 4 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cao nguyên đá vôi (cacxtơ) là
A. Mơ Nông.
B. Đồng Văn.
C. Di Linh.
D. Kon Tum. Đáp án là: B. Đồng Văn. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Nếu ghép 3 pin giống nhau nối tiếp thu được bộ nguồn 7, 5 V và 3 Ω thì khi mắc 3 pin đó song song thu được bộ nguồn
A. 2,5 V và 1 Ω
B. 7,5 V và 1 Ω
C. 7,5 V và 1 Ω
D. 2,5 V và 1 3 Ω Đáp án là: D. 2,5 V và 1 3 Ω </s> | [
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<s> Chọn đáp án đúng với câu hỏi: “Một trong những tiến bộ của phong trào yêu nước Việt Nam đầu thế kỉ XX là ở quan niệm về phạm trù yêu nước”. Đây là nhận định
A. đúng, vì hoạt động của các sĩ phu gắn liền với khái niệm “dân quyền”, “dân chủ”.
B. sai, phạm trù yêu nước thương dân luôn ăn sâu vào tư tưởng người dân Việt Nam.
C. đúng, vì các sĩ phu đã đưa ra vấn đề yêu nước phải gắn với xây dựng xã hội tiến bộ.
D. sai, vì khuynh hướng cứu nước mới của các sĩ phu không đem đến sự thành công. Đáp án là: C. đúng, vì các sĩ phu đã đưa ra vấn đề yêu nước phải gắn với xây dựng xã hội tiến bộ. </s> | [
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30... | [
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1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Trộn 200 ml dung dịch chứa 12 gam MgSO 4 với 300 ml dung dịch chứa 34,2 gam Al 2 SO 4 3 thu được dung dịch X. Nồng độ ion SO 4 2 - trong X là
A. 0,2M.
B. 0,8M.
C. 0,6M.
D. 0,4M. Đáp án là: B. 0,8M. </s> | [
1,
1,
29871,
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29976,
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29871,
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274,
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29901,
8316,
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29906,
29900,
29900,
286,
29880,
27... | [
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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: Sự khác nhau giữa ảnh thật và ảnh ảo ở thấu kính hội tụ là
A. ảnh thật luôn cùng chiều với vật.
B. ảnh ảo luôn cùng chiều với vật.
C. ảnh thật luôn lớn hơn vật.
D. ảnh ảo luôn nhỏ hơn vật. Đáp án là: B. ảnh ảo luôn cùng chiều với vật. </s> | [
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29901,
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413,
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30103,
29883,
302,
29882,
585,
40... | [
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1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Hỗn hợp T gồm 2 chất hữu cơ đơn chức X và Y đều có công thức phân tử là C 2 H 4 O 2. Đun nóng m gam hỗn hợp E với dung dịch NaOH dư, đến khi phản ứng xảy ra hoàn toàn đuợc 9,28 gam muối. Mặt khác cho cùng m gam hỗn hợp E trên phản ứng với luợng dư dung dịch AgNO 3 trong NH 3, thu đuợc 8,64 gam Ag. Giá trị của m là
A. 8,4.
B. 6,0.
C. 9,6.
D. 7,2. Đáp án là: D. 7,2 </s> | [
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5089,
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323,
748,
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1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Tập tất cả các giá trị của tham số m để bất phương trình (m^2+3m)x≤m^2 nghiệm đúng với mọi x là:
A. (0;1)
B. {0}
C. {0;-3}
D. {1} Đáp án là: C. {0;-3} </s> | [
1,
1,
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678,
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29876,
29871,
30128,
29976,
29886,
29871,
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274,
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29875,
29901,
323,
31142,
29886,
260,
31145,
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274,
30643,
274,
25968,
4005,
... | [
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1,
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1,
1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Let’s play soccer, _________?
A. aren’t you
B. won’t you
C. will we
D. shall we Đáp án là: D. shall we </s> | [
1,
1,
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29976,
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29871,
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29875,
274,
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29884,
298,
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29875,
29901,
2803,
30010,
29879,
1708,
269,
11953,
29892,
903,
14365,
29973,
13,
... | [
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1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: My head teacher has grave doubts as to whether I would pass my university entrance examination. I myself feel so worried.
A. personal
B. serious
C. private
D. specific Đáp án là: B. serious </s> | [
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27455,
1372,
408,
304,
3692,
306,
72... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Hạt nhân nguyên tử được cấu tạo bở
A. prôtôn, nơtron và êlectron
B. nơtron và êlectron
C. prôtôn và êlectron
D. prôtôn và nơtron Đáp án là: D. prôtôn và nơtron </s> | [
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1,
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678,
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29876,
29871,
30128,
29976,
29886,
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302,
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302,
2543,
4099,
31500,
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1,
1,
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 C 4 H 4, C 4 H 2, C 4 H 6, C 4 H 8 và C 4 H 10. Tỉ khối của X so với H 2 là 27. Đốt cháy hoàn toàn X, cần dùng vừa đủ V lít O 2 (đktc), thu được CO 2 và 0,03 mol H 2 O. Giá trị của V là:
A. 3,696.
B. 1,232.
C. 7,392.
D. 2,464. Đáp án là: B. 1,232. </s> | [
1,
1,
29871,
678,
30975,
29876,
29871,
30128,
29976,
29886,
29871,
1715,
29871,
30128,
30030,
865,
325,
31280,
29875,
274,
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29884,
298,
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29875,
29901,
8335,
31500,
30478,
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5089,
207,
158,
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29886,
1060,
748,
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1... |
<s> Chọn đáp án đúng với câu hỏi: If you graduated from high school in Viet Nam, you will need to complete a Foundation Year to be _______ for admission to an undergraduate degree in the UK
A. entered
B. eligible
C. put
D. recommended Đáp án là: B. eligible </s> | [
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1,
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29876,
29871,
30128,
29976,
29886,
29871,
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274,
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29901,
960,
366,
23588,
515,
1880,
3762,
297,
478,
2035,
13041,
29892,
366... | [
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