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<s> Chọn đáp án đúng với câu hỏi: What would you do if you _____________ a million dollars?
A. win
B. won
C. had won
D. will win Đáp án là: B. won </s> | [
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<s> Chọn đáp án đúng với câu hỏi: According to the second paragraph, all of the following steps are mentioned in hunting jobs today EXCEPT _______________.
A. getting information about necessary skills or degrees
B. doing a Ph.D degree
C. deciding on a profession
D. learning about different professions Đáp án là: B. do... | [
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<s> Chọn đáp án đúng với câu hỏi: Chất điểm là:
A. Vật chuyển động trên khoảng cách mà ta xét
B. Vật có kích thước lớn so với khoảng cách mà ta xét
C. Vật có kích thước rất nhỏ so với khoảng cách mà ta xét
D. Vật có kích thước lớn chuyển động trên khoảng cá... | [
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<s> Chọn đáp án đúng với câu hỏi: Choose the word whose the underlined part is pronounced differently
A. Toge th er
B. Airwor th y
C. Th an
D. Ba th Đáp án là: D. Ba th </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Sau Đổi mới, hoạt động buôn bán của nước ta ngày càng mở rộng theo hướng
A. Đa dạng hoá, đa phương hoá thị trường.
B. Chủ yếu tập trung vào thị trường Trung Quốc.
C. Chú trọng vào thị trường Nga và Đông Âu.
D. Chủ yếu tập trung ... | [
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<s> Chọn đáp án đúng với câu hỏi: Xô viết Nghệ Tĩnh có hình thức tổ chức và hoạt động giống với
A. chính quyền kiểu mới
B. công xã Pa ri
C. các Xô viết ở Nga trong Cách mạng tháng 10 -1917
D. xô viết ở Nga trong cách mạng tháng 2-1917 Đáp án là: C. các Xô viết ở Nga... | [
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<s> Chọn đáp án đúng với câu hỏi: Khẳng định nào sau đây là sai?
A. Phép chiếu song song biến trung điểm của đoạn thẳng thành trung điểm của đoạn thẳng hình chiếu.
B. Phép chiếu song song biến trọng tâm tam giác thành trọng tâm tam giác hình chiếu.
C. Phép chiếu song song biến tâm của hình bình hành thành tâm của hình ... | [
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<s> Chọn đáp án đúng với câu hỏi: Hiện tượng nào dưới đây không phản ánh sự lớn lên và phân chia của tế bào thực vật?
A. Sự gia tăng diện tích bề mặt của một chiếc lá
B. Sự xẹp, phồng của các tế bào khí khổng
C. Sự tăng dần kích thước của một củ khoa... | [
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<s> Chọn đáp án đúng với câu hỏi: The continental shelf is the shadow area of the ocean floor that is closest to the continents.
A. The continental shelf
B. the shadow area
C. ocean floor
D. closest to Đáp án là: D. closest to </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Tài nguyên du lịch nào sau đây không phải là tài nguyên du lịch nhân văn?
A. Văn hóa dân gian.
B. Các vườn quốc gia.
C. Các công trình kiến trúc.
D. Các di tích lịch sử. Đáp án là: B. Các vườn quốc gia. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho các chất sau: không khí ở 0 o C, không khí ở 25 0 C, nước và sắt. Sóng âm truyền nhanh nhất trong
A. sắt
B. không khí ở 0 o C
C. không khí ở 25 0 C
D. nước Đáp án là: A. sắt </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Chất hữu cơ E (C, H, O) đơn chức, có tỉ lệ m C : m O = 3 : 2. Đốt cháy hết E thu được. Thủy phân 4,3 gam E trong môi trường kiềm, thu được muối của axit hữu cơ X và 2,9 gam một ancol Y. Nhận xét sai là :
A. Chất E có thể tham gia phản u... | [
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<s> Chọn đáp án đúng với câu hỏi: Chọn từ thích hợp điền vào chỗ chấm để hoàn thành khái niệm sau: “...... là toàn bộ những hình thức khác nhau của tư liệu lịch sử, chứa đựng những thông tin về quá khứ của loài người”.
A. Dã sử.
B. Lịch sử.
C. Sử học.
D. Su... | [
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<s> Chọn đáp án đúng với câu hỏi: Số tự nhiên liền trước số 7428 là số:
A. 7427
B. 7429
C. 7439
D. 7430 Đáp án là: A. 7427 </s> | [
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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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<s> Chọn đáp án đúng với câu hỏi: Căn cứ vào Atlat Địa lí Việt Nam trang 5 và trang 10, cho biết sông Cả thuộc tỉnh
A. Thanh Hóa.
B. Hà Tĩnh.
C. Nghệ An.
D. Quảng Bình. Đáp án là: C. Nghệ An. </s> | [
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2... | [
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<s> Chọn đáp án đúng với câu hỏi: Vua chích chòe cùng thể loại với văn bản nào dưới đây?
A. Cây khế
B. Thánh Gióng
C. Sơn Tinh, Thủy Tinh
D. Ai ơi mồng 9 tháng 4 Đáp án là: A. Cây khế </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho dãy các c h ất: Ca(HCO 3 ) 2, N H 4 Cl, (N H 4 ) 2 C O 3, ZnS O 4, Al(OH ) 3, Zn(OH ) 2, CH 3 COONH 4. Số c h ấ t t r ong dãy có tính chất lư ỡ ng tính là
A. 5
B. 3
C. 4
D. 2 Đáp án là: A. 5 </s> | [
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1,
1,
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1... |
<s> Chọn đáp án đúng với câu hỏi: Cho các mối quan hệ sau: I. Vi khuẩn Rhizobium và rễ cây họ đậu. II. Cây phong lan sống bám trên cây thân gỗ. III. Chim tu hú đẻ trứng mình vào tổ chim khác. IV. Vi khuẩn lam và nấm sống chung tạo địa y. Có bao nhiêu mối quan hệ thuộc ki... | [
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1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Hãy chọn câu đúng trong các câu sau: Khi cân một túi đường bằng một cân đồng hồ.
A. Cân chỉ trọng lượng của túi đường
B. Cân chỉ khối lượng của túi đường
C. Trọng lượng của túi đường làm quay kim của cân
D. Khối lượng của t... | [
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30... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Ngọc có 34 quyển sách. Sau khi cho Lan mượn 7 quyển sách, Ngọc cho Phương mượn số quyển sách bằng số quyển sách còn lại chia cho 3. Hỏi Ngọc cho Phương mượn bao nhiêu quyển sách?
A. 9 quyển sách.
B. 8 quyển sách.
C. 7 quyển sách.
D. 6 quyển sách. Đáp án là: A. 9 quyển sách. </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Nguyên tắc bổ sung được thể hiện trong cơ chế tự nhân đôi của ADN là
A. A liên kết U ; G liên kết X
B. A liên kết X ; G liên kết T
C. A liên kết T ; G liên kết X
D. A liên kết U ; T liên kết A ; G liên kết X ; X liên kết G Đáp án là: C... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Biết rằng y = f(x) là một hàm số lẻ trên tập xác định D. Khẳng định nào sai?
A. f[sin(−x)] = −f(sin x)
B. f[cos(−x)] = f(cos x)
C. sin[f(−x)] = sin[f(x)]
D. cos[f(−x)] = cos[f(x)] Đáp án là: C. sin[f(−x)] = sin[f(x)] </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Từ dầu mỏ người ta có thể sản xuất ra được nhiều loại như:
A. Hóa phẩm, thực phẩm
B. Thực phẩm, mỹ phẩm
C. Hóa phẩm, dược phẩm
D. Dược phẩm, thực phẩm Đáp án là: C. Hóa phẩm, dược phẩm </s> | [
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<s> Chọn đáp án đúng với câu hỏi: The author mentions the sources of energy such as wind, steam, petrol in the first paragraph to________.
A. suggest that electricity should be alternated with safer sources of energy.
B. emphasize the usefulness and adaptability of electricity.
C. imply that electricity is not the only... | [
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<s> Chọn đáp án đúng với câu hỏi: She was unhappy that she lost contact with a lot of her old friends when she went abroad to study.
A. made room for
B. put in charge of
C. got in touch with
D. lost control of Đáp án là: C. got in touch with </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Những cánh buồm là sáng tác của ai?
A. Nguyễn Trung Thông
B. Hoàng Trung Thông
C. Xuân Quỳnh
D. Y Phương Đáp án là: B. Hoàng Trung Thông </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Loại nào sau đây không thuộc tài nguyên du lịch nhân văn?
A. Lễ hội truyền thống.
B. Công trình kiến trúc.
C. Hang động cacxtơ.
D. Làng nghề truyền thống. Đáp án là: C. Hang động cacxtơ. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Căn cứ vào Atlat Địa lí Việt Nam trang 18, cho biết vùng nông nghiệp nào sau đây chuyên môn hóa sản xuất dừa lớn nhất nước ta?
A. Đồng bằng sông Hồng.
B. Đồng bằng sông Cửu Long.
C. Đông Nam Bộ.
D. Bắc Trung Bộ. Đáp án là: B. Đồng b... | [
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2... | [
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<s> Chọn đáp án đúng với câu hỏi: Hiến chương của Liên hợp quốc được thông qua tại hội nghị nào?
A. Hội nghị Ianta.
B. Hội nghị Xan Phranxicô.
C. Hội nghị Pốtxđam.
D. Hội nghị Pari. Đáp án là: B. Hội nghị Xan Phranxicô. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Sau Chiến tranh thế giới thứ hai, thái độ của các nước tư bản Tây Âu về vấn đề độc lập dân tộc ở các thuộc địa như thế nào?
A. Đa số ủng hộ việc công nhận nền độc lập của các nước thuộc địa.
B. Tìm cách thiết lập ... | [
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<s> Chọn đáp án đúng với câu hỏi: Nếu trong một đoạn mạch điện xoay chiều không phân nhánh, cường độ dòng điện trễ pha so với hiệu điện thế giữa hai đầu đoạn mạch, thì đoạn mạch này gồm
A. tụ điện và biến trở
B. cuộn dây thuần cảm và tụ điện với cảm kháng... | [
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<s> Chọn đáp án đúng với câu hỏi: Động năng ban đầu cực đại của các quang electron bứt ra khỏi tấm kẽm cô lập về điện được chiếu bởi ánh sáng thích hợp phụ thuộc vào
A. Cường độ của chùm sáng kích thích
B. Thời gian chiếu sáng kích thích.
C. Diện tích chiếu s... | [
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<s> Chọn đáp án đúng với câu hỏi: Cho các sơ đồ phản ứng sau: 1. C + O 2 → t ° CO 2 2. C + CuO → t ° Cu + CO 3. C + Ca → t ° CaC 2 4. C + H 2 → t ° CH 4 5. C + H 2 SO 4 ( đặc ) → t ° SO 2 + CO 2 + H 2 O 6. C + H 2 O → t ° CO + H 2 Các phản ứng cacbon thể hiện tính oxi hóa là
A. 1, 2, 5, 6
B. 3, 4
C.... | [
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<s> Chọn đáp án đúng với câu hỏi: Ý nghĩa thực tiễn của hiện tượng di truyền liên kết là
A. đảm bảo cho sự di truyền bền vững của các tính trạng tốt trong cùng một giống
B. tăng cường biến dị tổ hợp cung cấp nguyên liệu cho quá trình chọn giống
C. giúp tăng ... | [
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<s> Chọn đáp án đúng với câu hỏi: Ý nào sau đây không phái ý nghĩa của Hiệp định Sơ bộ ngày 6/3/1946?
A. Có thêm thời gian hoà hoãn để củng cố chính quyền cách mạng.
B. Mở ra một khả năng giải quyết vấn đề Việt Nam bằng thương lượng, tỏ rõ thiện chí hoà bình c... | [
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<s> Chọn đáp án đúng với câu hỏi: Nhờ đâu vào thế kỷ XVII nước Anh giàu lên nhanh chóng?
A. Nhờ sự phát triển mạnh mẽ của ngoại thương
B. Nhờ sự phát triển nông nghiệp
C. Nhờ sự phát triển các ngành thủ công nghiệp
D. Nhờ buôn bán các mặt hàng nông sản Đáp án l... | [
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<s> Chọn đáp án đúng với câu hỏi: Ngành khai thác than có vai trò quan trọng trong việc cung cấp nhiên liệu cho
A. Nhà máy chế biến thực phẩm.
B. Công nghiệp sản xuất hàng tiêu dùng.
C. Nhà máy nhiệt điện, nhà máy luyện kim.
D. Nhà máy thủy điện, nhà máy điện hạt nhân... | [
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<s> Chọn đáp án đúng với câu hỏi: Mĩ La tinh trải dài trên các đới khí hậu là
A. xích đạo, nhiệt đới, cận nhiệt.
B. nhiệt đới, cận nhiệt, ôn đới.
C. xích đạo, nhiệt đới, cận nhiệt, ôn đới.
D. nhiệt đới, cận nhiệt, ôn đới, hàn đới. Đáp án là: C. xích đạo, nhie... | [
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<s> Chọn đáp án đúng với câu hỏi: In general, Chinese cartoons are now aiming at________.
A. illustrating the truth of Chinese great men’s famous sayings
B. bringing education to illiterate and semi-literate people in the world
C. spreading the Chinese ideas and cultural values throughout the world
D. disseminating tra... | [
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<s> Chọn đáp án đúng với câu hỏi: Which of the following statement is supported by the passage?
A. Computers have reduced the costs of animation.
B. In the future, traditional artists will no longer be needed.
C. Artists are unable to produce drawings as high in quality as computer drawings.
D. Animation involves a wid... | [
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<s> Chọn đáp án đúng với câu hỏi: John wishes he could drive a car, but he isn’t enough old to get a driving license.
A. wishes
B. could
C. enough old
D. driving license Đáp án là: C. enough old </s> | [
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1,
1,
1,
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: Quan sát biểu đồ quy mô dân số châu Âu, giai đoạn 1950-2020 nhận xét nào sau đây là đúng?
A. Quy mô dân số ở châu Âu tăng nhanh.
B. Quy mô dân số ở châu Âu không có sự tăng trưởng.
C. Quy mô dân số ở châu Âu tăng rất nhanh.
D. Quy ... | [
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<s> Chọn đáp án đúng với câu hỏi: Cho 21,8 gam chất hữu cơ X mạch hở chỉ chứa một loại nhóm chức tác dụng với 1 lít dung dịch NaOH 0,5M thu được 24,6 gam muối và 0,1 mol ancol. Lượng NaOH dư được trung hoà vừa hết bởi 0,5 lít dung dịch HCl 0,4M. Công thức cấu tạo của ... | [
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<s> Chọn đáp án đúng với câu hỏi: Cho một vật rơi tự do từ độ cao h. Biết rằng trong 2s cuối cùng vật rơi được quãng đường bằng quãng đường đi trong 5s đầu tiên, g = 10 m / s 2. Tìm độ cao lúc thả vật và thời gian vật rơi.
A. 252,81m; 7,25s
B. 249m; 7,52s
C. 225m; 7,25s... | [
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<s> Chọn đáp án đúng với câu hỏi: Cho các amin có công thức cấu tạo sau: (1) CH 3 - CH 2 - CH 2 - NH 2 (2) CH 3 - NH - CH 2 - CH 3 Amin nào là amin bậ c ba?
A. (2).
B. (3).
C. (1).
D. (4). Đáp án là: D. (4) </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Nội dung chính của đoạn trích dưới đây: Rất công bằng, rất thông minh Vừa độ lượng lại đa tình, đa mang Thị thơm thị giấu người thơm Chăm làm thì được áo cơm, cửa nh? Đẽo cày theo ý người ta Sẽ thành khúc gỗ, chẳng ra việc gi... | [
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<s> Chọn đáp án đúng với câu hỏi: Điểm khác biệt của sự lan truyền xung thần kinh trên sợi trục có bao miêlin so với sợi trục không có bao miêlin là
A. dẫn truyền theo lối “nhảy cóc”, chậm và ít tiêu tốn năng lượng.
B. dẫn truyền theo lối “nhảy cóc”, chậm chạp va... | [
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<s> Chọn đáp án đúng với câu hỏi: Vận tốc truyền sóng trong một môi trường :
A. Phụ thuộc vào bản chất môi trường và tần số sóng.
B. Chỉ phụ thuộc vào bản chất môi trường.
C. Phụ thuộc vào bản chất môi trường và biên độ sóng.
D. Tăng theo cường độ sóng. Đ... | [
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<s> Chọn đáp án đúng với câu hỏi: Hỏi có bao nhiêu đa thức bậc ba P(x) =ax^3+bx^2+cx+d mà các hệ số a, b, c, d thuộc tập {-3,-2,0,2,3}. Biết rằng: các hệ số tùy ý.
A. 3125
B. 625
C. 500
D. 360 Đáp án là: C. 500 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Stop, boys! It’s _____ near the streets.
A. dangerous for playing
B. dangerously to play
C. dangerous to playing
D. dangerous to play Đáp án là: D. dangerous to play </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Công thức cấu tạo thu gọn của hợp chất 3 – metylbut – 1 – in là
A. CH 3 −C≡C−CH 2 −CH 3
B. CH 3 CH 2 CH 2 −C≡CH
C. (CH 3 ) 2 CH−C≡CH
D. CH 3 CH 2 −C≡C−CH 3 Đáp án là: C. (CH 3 ) 2 CH−C≡CH </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Trong các trường hợp sau, trường hợp nào có sự chuyển hóa thế năng thành động năng?
A. Mũi tên được bắn đi từ cung.
B. Nước trên đập cao chảy xuống.
C. Hòn bi lăn từ đỉnh dốc xuống dưới.
D. Cả ba trường hợp trên Đáp án là: D... | [
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<s> Chọn đáp án đúng với câu hỏi: Sau cải cách của vua Minh Mạng, cơ quan quản lí cấp tỉnh gồm hai ty là:
A. Bố chánh sứ ty và Án sát sứ ty.
B. Đô tổng binh sứ và Thừa chính sứ.
C. Thừa chính sứ và Hiến sát sứ.
D. Đô tổng binh sứ và Hiến sát sứ. Đáp án là: A. Bố... | [
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<s> Chọn đáp án đúng với câu hỏi: Những hợp chất nào sau đây có đồng phân hình học (cis-trans)? CH 3 CH = CH 2 (I); CH 3 CH = CHCl (II); CH 3 CH = C(CH 3 ) 2 (III); C 2 H 5 –C (CH 3 )=C(CH 3 )–C 2 H 5 (IV); C 2 H 5 –C(CH 3 )=CCl–CH 3 (V).
A. (I), (IV), (V).
B. (II), (IV), (V).
C. (III), (IV).
D. (II), III... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Dùng vôn kế mắc vào hai đầu một hiệu điện thế xoay chiều có suất điện động tức thời e = 220 2 cos 100 πt + π V, vôn kế chỉ giá trị là
A. 220 2 V
B. 110 2 V
C. 220 V
D. 440 V Đáp án là: C. 220 V </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Sản xuất nông nghiệp không thể diễn ra khi không có
A. đất đai.
B. địa hình.
C. nguồn nước.
D. sinh vật. Đáp án là: A. đất đai. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một người thợ may may một cái áo hết 1 giờ 45 phút và may một cái quần hết 1 giờ 20 phút. Hỏi người thợ đó may 4 cái áo và 5 cái quần hết bao nhiêu thời gian? Biết thời gian may 1 cái áo, 1 cái quần không thay đổi.
A. 3 giờ 5 phút
B. 6 giờ 40 phút
C. 7 giờ
D. 13 giờ 40 phút Đáp án là: ... | [
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<s> Chọn đáp án đúng với câu hỏi: Để góp phần bảo vệ rừng, điều không nên là:
A. Chấp hành tốt các qui định về bảo vệ rừng
B. Tiếp tục trồng cây gây rừng, chăm sóc rừng hiện có
C. Khai thác sử dụng nhiều hơn cây rừng và thú rừng
D. Kết hợp khai thác hợp ... | [
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<s> Chọn đáp án đúng với câu hỏi: Tại 3 đỉnh A, B, C của hình vuông ABCD cạnh a đặt 3 điện tích dương cùng độ lớn. Độ lớn cường độ điện trường do 3 điện tích gây ra tại tâm hình vuông và tại đỉnh D lần lượt là E 0 và E D. T ỉ số E 0 E D gần giá trị nào nhất sa... | [
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<s> Chọn đáp án đúng với câu hỏi: Viết tập hợp các số tự nhiên nhỏ hơn 40 là bội chung của 6 và 9 là:
A.{0; 18; 36; 54;.....}
B.{0; 12; 18; 36}
C.{0; 18; 36}
D.{0; 18; 36; 54} Đáp án là: C.{0; 18; 36} </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho f(x)=2x^2(x-1)-5(x+2)-2x(x-2); g(x)=x^2(2x-3)-x(x+1)-(3x-2)Tính h(x) = f(x) - g(x).
A. 3x-12.
B. -8x^2-5x-8.
C. -5x-8.
D. 3x-8. Đáp án là: A. 3x-12. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Choose the word that has the underlined part pronounced differently from the rest
A. t a le
B. h a ng
C. l a nd
D. h a nd Đáp án là: A. t a le </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Thủy phân hoàn toàn triglixerit X sau phản ứng thu được axit oleic (C 17 H 33 COOH) và axit linoleic (C 17 H 31 COOH). Nếu đốt cháy hoàn toàn m gam X cần 76,32 gam oxi thu được 75,24 gam CO 2. Mặt khác, m gam X tác dụng vừa đủ với V ml dung dịch Br 2 1... | [
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<s> Chọn đáp án đúng với câu hỏi: Cho hàm số \[f(x) = 2mx - m{x^3}\]. Số \[x = 1\] là nghiệm của bất phương trình \[f'(x) \le 1\] khi và chỉ khi:
A. \[m \ge 1.\]
B. \[m \le - 1.\]
C. \[ - 1 \le m \le 1.\]
D. \[m \ge - 1.\] Đáp án là: D. \[m \ge - 1 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Địa danh nào được đề cập đến trong câu đố sau? “Nơi nào Bác đã ra đi, Tìm đường cứu nước cũng vì non sông?”
A. Cảng Nhà Rồng.
B. Cảng Cái Lân.
C. Cảng Vân Đồn.
D. Cảng Vũng Áng. Đáp án là: A. Cảng Nhà Rồng. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho các thông tin sau: 1. mARN sau phiên mã được sử dụng trực tiếp làm mạch khuôn để tổng hợp protein. 2. Khi riboxom tiếp xúc với mã kết thúc trên mARN thì quá trình dịch mã kết thúc. 3. Nhờ 1 enzyme đặc hiệu, axit amin mở đầu được... | [
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<s> Chọn đáp án đúng với câu hỏi: Biểu hiện nào sau đây chứng tỏ địa hình nước ta có cấu trúc cổ được vận động Tân kiến tạo làm trẻ lại?
A. Địa hình của vùng nhiệt đới ẩm gió mùa và chịu tác động mạnh mẽ của con người.
B. Đồng bằng và đồi núi thấp chiê... | [
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<s> Chọn đáp án đúng với câu hỏi: Khi một vật khối lượng m được treo vào một lò xo có độ dài tự nhiên l0 thì lò xo có độ dài là l. Kéo vật xuống phía dưới một đoạn nhỏ a rồi thả ra cho vật dao động điều hoà. Chu kì dao động của vật là
A. T = 2 π a g
B. T = 2 π... | [
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274,
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29901,
476,
2918,
2730,
31214,
31500,
29873,
2947,
31214,
31500,
29873,
413,... | [
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<s> Chọn đáp án đúng với câu hỏi: There's a path that ____ out of the village to a beautiful 14th-century church.
A. follows
B. moves
C. takes
D. leads Đáp án là: D. leads </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Saccarozơ bị than hoá khi gặp H 2 SO 4 đặc theo phản ứng: C 12 H 22 O 11 + H 2 SO 4 → SO 2 ↑ + CO 2 ↑ + H 2 O Tổng các hệ số cân bằng (tối giản) của phương trình phản ứng trên là
A. 57.
B. 85.
C. 96.
D. 100 Đáp án là: C. 96. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho dãy các chất: cumen, stiren, isopren, xiclohexan, axetilen, benzen. Số chất trong dãy làm mất màu dung dịch brom là
A. 2.
B. 3
C. 4.
D. 5. Đáp án là: B. 3 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Có 24 quả cam xếp đều vào 4 túi. Hỏi mỗi túi có bao nhiêu quả cam?
A. 3 quả
B. 4 quả
C. 5 quả
D. 6 quả Đáp án là: D. 6 quả </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Giá trị ngoại lệ trong mẫu là
A. giá trị ở chính giữa trong dãy không giảm của mẫu số liệu;
B. giá trị xuất hiện nhiều nhất trong các giá trị của mẫu số liệu;
C. giá trị quá nhỏ hay quá lớn với đa số các giá trị của mẫu số liệu;
D. giá trị trung bình cộng của các giá trị của mẫu số liệ... | [
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<s> Chọn đáp án đúng với câu hỏi: I must have browsed through hundreds of, but I have no idea where to go for this year holiday.
A. booklets
B. yellow pages
C. brochures
D. propaganda Đáp án là: C. brochures </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Âm mưu của Pháp, Mĩ trong việc xây dựng tập đoàn cứ điểm Điện Biên Phủ là gì?
A. Chọn Điện Biên Phủ làm điểm quyết chiến chiến lược với ta
B. Điện Biên Phủ là một đầu mối giao thông quan trọng, địch sử dụng lực lượng khôn... | [
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<s> Chọn đáp án đúng với câu hỏi: Cho 86,3 gam hỗn hợp X gồm Na, K, Ba và Al 2 O 3 (trong đó oxi chiếm 19,47% về khối lượng) tan hết vào nước, thu được dung dịch Y và 13,44 lít khí H 2 (đktc). Cho 3,2 lít dung dịch HCl 0,75M vào dung dịch Y. Sau khi các phản ứng xảy ra hoàn toàn... | [
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<s> Chọn đáp án đúng với câu hỏi: Công thức tính lực từ là
A. F = q 0 vBsinα.
B. F = q 0 vBcosα.
C. F = BIlcosα.
D. F = BIlsinα. Đáp án là: D. F = BIlsinα </s> | [
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<s> Chọn đáp án đúng với câu hỏi: The pituitary gland is a small endocrine gland at the base of the brain that releases many hormones and regulates another endocrine glands.
A. at
B. many
C. regulates
D. another Đáp án là: D. another </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Hai lò xo có độ cứng k 1, k 2 mắc nối tiếp, đầu trên mắc vào trần một toa xe lửa, đầu dưới mang vật m = 1kg. Khi xe lửa chuyển động với vận tốc 90km/h thì vật nặng dao động mạnh nhất. Biết chiều dài mỗi thanh ray là 12,5m, k ... | [
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<s> Chọn đáp án đúng với câu hỏi: “Shall we join the Green Summer Camp after the semester finishes?”
A. That’s a great idea!
B. They’re very good!
C. Not at all!
D. No, let’s! Đáp án là: A. That’s a great idea! </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho 2 công thức phân tử C 4 H 10 O và C 4 H 11 N, số đồng phân ancol bậc 2 và amin bậc 2 lần lượt là:
A. 1 và 1.
B. 1 và 3.
C. 4 và 1.
D. 4 và 8. Đáp án là: B. 1 và 3. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Where would this passage most probably be found?
A. In a newspaper
B. In a textbook.
C. In a travel folder
D. In a university catalog. Đáp án là: A. In a newspaper </s> | [
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445,
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1556,
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367,
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13,
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298... | [
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<s> Chọn đáp án đúng với câu hỏi: Từ chất X thực hiện các phản ứng hóa học sau: X + KOH → t o Y + Z Y + Br 2 + H 2 O → T + 2HBr T + KOH → Z + H 2 O Chất X có thể là
A. HCOOCH=CH 2.
B. CH 3 COOCH 3.
C. CH 2 =CHCOOCH=CHCH 3.
D. C 2 H 5 COOCH=CHCH 3. Đáp án là: D. C 2 H 5 COOCH=CHCH 3 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Hoà tan hỗn hợp gồm 0,2 mol Fe và 0,2 mol Fe 3 O 4 bằng dung dịch HCl dư thu được dung dịch A. Cho A tác dụng với dung dịch NaOH dư, rồi lấy kết tủa nung trong không khí đến khối lượng không đổi thu được m gam chất rắn. Giá trị của m l... | [
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<s> Chọn đáp án đúng với câu hỏi: Con lắc đơn treo ở trần một thang máy, đang dao động điều hoà. Khi con lắc về đúng tới vị trí cân bằng thì thang máy bắt đầu chuyển động nhanh dần đều lên trên thì
A. biên độ dao động giảm.
B. biên độ dao động không thay đổi.
C.... | [
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<s> Chọn đáp án đúng với câu hỏi: Có các thí nghiệm sau (các phản ứng xảy ra hoàn toàn): (a) Cho hỗn hợp Na và Al (tỉ lệ mol 2 : 1) vào nước dư. (b) Cho CrO 3 vào nước dư. (c) Cho hỗn hợp BaO và Na 2 CO 3 (tỉ lệ mol 1 : 1) vào nước dư. (d) Cho x mol hỗn hợp Fe 2 O 3 và Cu... | [
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<s> Chọn đáp án đúng với câu hỏi: Cho X={x∈R:−2≤x<5}. Tập X có thể được viết là:
A. (−2;5)
B. [−2;5]
C. [−2;5)
D. (−2;5] Đáp án là: C. [−2;5) </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Chuỗi đô thị tương đối lớn và đang thu hút được nhiều đầu tư nước ngoài của vùng Duyên hải Nam Trung Bộ là
A. Đà Nẵng, Tuy Hòa, Nha Trang, Phan Thiết.
B. Quảng Ngãi, Quy Nhơn, Nha Trang.
C. Đà Nẵng, Quy Nhơn, Nha Trang, Phan Thiết.
D. Nha T... | [
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<s> Chọn đáp án đúng với câu hỏi: Hỗn hợp X bao gồm các chất rắn: K 2 SO 3, NaHSO 3, Na 2 SO 4, NaOH lần lượt cho tác dụng với dung dịch H 2 SO 4 loãng dư. Số chất rắn tan đồng thời có giải phóng khí là
A. 4.
B. 1.
C. 2.
D. 3. Đáp án là: C. 2. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: X là một este có cấu tạo đối xứng, có công thức phân tử C 16 H 14 O 4. Một mol X tác dụng được với bốn mol NaOH. Muối natri của axit thu được sau phản ứng xà phòng hoá nếu đem đốt cháy chỉ thu được CO 2 và xôđa. X là
A. este của axi... | [
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<s> Chọn đáp án đúng với câu hỏi: Có 500 ml dung dị c h X c hứa c á c ion: K +, H C O 3 -, Cl – v à B a 2+. L ấ y 100 ml dung dị c h X ph ả n ứ ng v ới du n g dị c h N a O H dư, k ế t th ú c c á c ph ả n ứng thu đư ợ c 19,7 g a m k ế t tủ a. L ấ y 100 ml dung dị c h X t á c dụng v ới... | [
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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 most suitable response to complete the following exchange. “Make yourself at home.” - “_____________________”
A. Not at all. Don’t mention it.
B. Yes. Can I help you?
C. That’s very kind. Thank you.
D. Thanks! Same to y... | [
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<s> Chọn đáp án đúng với câu hỏi: Tiến hành thí nghiệm với các dung dịch muối clorua riêng biệt của các cation: X 2+, Y 3+, Z 3+, T 2+. Kết quả ghi được ở bảng sau: Các cation X 2+, Y 3+, Z 3+, T 2+ lần lượt là:
A. Ba 2+, Cr 3+, Fe 2+, Mg 2+.
B. Ba 2+, Fe 3+, Al 3+, Cu 2+.
C.Ca 2+, Au 3... | [
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<s> Chọn đáp án đúng với câu hỏi: Khi vật nổi trên chất lỏng thì lực đẩy Ác – si – mét có cường độ:
A. Nhỏ hơn trọng lượng của vật.
B. Lớn hơn trọng lượng của vật.
C. Bằng trọng lượng của vật.
D. Nhỏ hơn hoặc bằng trọng lượng của vật. Đáp án là: A. Nhỏ hơn... | [
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<s> Chọn đáp án đúng với câu hỏi: Trái Đất được cấu tạo bởi các lớp nào sau đây?
A. Man-ti, vỏ Trái Đất và nhân trong.
B. Nhân (lõi), nhân ngoài, vỏ Trái Đất.
C. Vỏ Trái Đất, man-ti và nhân (lõi).
D. Vỏ lục địa, nhân (lõi) và man-ti. Đáp án là: C. Vỏ Trái Đất, man-ti và n... | [
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1,
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1,
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<s> Chọn đáp án đúng với câu hỏi: Thế nào là lai phân tích:
A. Là phép lai giữa các cá thể mang kiểu gen dị hợp.
B. Là phép lai giữa cá thể mang tính trạng trội cần xác định kiểu gen với cá thể mang tính trạng lặn.
C. Là phép lai giữa các cá thể mang tính trạng lạ... | [
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,
450,
31500,
30103,
1055,
30712,
29877,
425,
30712,
425,
29875,
1374,
... | [
1,
1,
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1,
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1,
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1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Xác định vị trí trọng tâm của bản mỏng đồng chất như hình vẽ. Chọn đáp án đúng.
A. Không nằm trên trục đối xứng
B. Nằm trên trục đối xứng, cách đáy 36,25cm.
C. Nằm trên trục đối xứng, cách đáy 16,5cm
D. Nằm trên trục đối xứng, ca... | [
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,
1060,
29874,
30103,
29883,
29871,
30128,
29875,
31214,
29876,
29882,
... | [
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Tìm và sửa lỗi sai: She was waiting nervous in the waiting room for the interview.
A. was
B. nervous
C. waiting
D. for Đáp án là: B. nervous </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,
18439,
30712,
29885,
2947,
30712,
480,
207,
158,
207,
140,
29874,
6... | [
1,
1,
1,
1,
1,
1,
1,
1,
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1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Nam is always _____ in class.
A. chat
B. chatted
C. chatting
D. is chat Đáp án là: C. chatting </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,
13041,
338,
2337,
903,
7652,
297,
770,
29889,
13,
29909,
29889,
135... | [
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,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<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 questions. Living things include both the visible world of animals, plants, and fungi as well as the invisible world of bacteria and viruses. On a basic level,... | [
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,
7523,
278,
1494,
13382,
322,
2791,
278,
5497,
319,
29892,
350,
2989... | [
1,
1,
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1,
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1,
1,
1,
1,
1,
1,
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1,
1,
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1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
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