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<s> Chọn đáp án đúng với câu hỏi: Choose the letter A, B, C or D to complete the sentences Where is Mary? She............ books in the library at the mom
A. is reading
B. reads
C. read
D. are reading Đáp án là: A. is reading </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Khẳng định nào sau đây là sai?
A. Hình bình hành có hai cạnh kề bằng nhau là hình thoi.
B. Hình bình hành có một đường chéo là đường phân giác của một góc là hình thoi.
C. Hình bình hành có hai đường chéo vuông góc với nhau là hình thoi.
D. Tứ giác có bốn góc bằng nhau là hình thoi. Đáp án là: D. Tứ giác có bốn góc bằng nhau là hình thoi </s> | [
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<s> Chọn đáp án đúng với câu hỏi: The world absolutely needs more ecotourism. It teaches travelers to be more responsible to the pristine areas of the world.
A. The world absolutely needs more ecotourism which teaches travelers to be more responsible to the pristine areas of the world.
B. The world absolutely needs more ecotourism as it teaches travelers to be more responsible to the pristine areas of the world.
C. The world absolutely needs more ecotourism so that it teaches travelers to be more responsible to the pristine areas of the world.
D. The world absolutely needs more ecotourism if it teaches travelers to be more responsible to the pristine areas of the world. Đáp án là: B. The world absolutely needs more ecotourism as it teaches travelers to be more responsible to the pristine areas of the world. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Nhiệt phân hoàn toàn AgNO 3 thu được sản phẩm là
A. Ag, NO 2, O 2
B. Ag 2 O, NO 2, O 2
C. AgNO 2, O 2
D. Ag, Ag 2 O, NO 2 Đáp án là: A. Ag, NO 2, O 2 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Số tròn chục lớn nhất có hai chữ số chia cho 3 được kết quả là bao nhiêu?
A. 25
B. 30
C. 31
D. 29 Đáp án là: B. 30 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Câu văn nào trong đoạn văn mang luận điểm?
A. Đã bao lần bạn vấp ngã mà không hề nhớ.
B. Vậy xin bạn chớ lo sợ thất bại.
C. Điều đáng sợ hơn là bạn đã bỏ qua nhiều cơ hội chỉ vì không cố gắng hết mình.
D. Cả A và B Đáp án là: D. Cả A và B </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Điều kiện để xảy ra phản ứng dây chuyền trong phân hạch hạt nhân là
A. hệ số nhân nơtron k = 1.
B. hệ số nhân nơtron k > 1.
C. hệ số nhân nơtron k ≥ 1.
D. hệ số nhân nơtron k ≤ 1. Đáp án là: C. hệ số nhân nơtron k ≥ 1. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Nguyên tử R có tống số hạt cơ bản là 52, trong đó số hạt không mang điện trong hạt nhân gấp 1,059 lần số hạt mang điện tích âm. Kết luận nào sau đây không đúng với R?
A. Hạt mang điện nhiều hơn hạt không mang điện là 16.
B. R có số kh ối là 35.
C. Điện tích hạt nhân của R là 17+.
D. R có 17 nơtron. Đáp án là: D. R có 17 nơtron </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Số đồng phân cấu tạo của este có công thức phân tử C 8 H 8 O 2 là
A. 6
B. 8
C. 5
D. 7 Đáp án là: A. 6 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Các vùng trồng cây ăn quả hàng đầu nước ta là
A. Trung du và miền núi Bắc Bộ và Đồng bằng sông Hồng.
B. Đông Nam Bộ và Đồng bằng sông Hồng.
C. Tây Nguyên và Đông Nam Bộ.
D. Đông Nam Bộ và Đồng bằng sông Cửu Long. Đáp án là: D. Đông Nam Bộ và Đồng bằng sông Cửu Long </s> | [
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<s> Chọn đáp án đúng với câu hỏi: The idea that having a good cry do you (3) _____ is a very old one and now it has scientific validity since recent research into tears has shown that they (4) _____ a natural painkiller called enkaphalin.
A. better
B. fine
C. good
D. well Đáp án là: C. good </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Nhiệm vụ tập hợp, xây dựng lực lượng khối đoàn kết dân tộc từ năm 1951 đến năm 1954 do mặt trận nào đảm nhiệm?
A. Mặt trận Việt Minh
B. Hội Liên Việt
C. Liên minh nhân dân Việt- Miên- Lào
D. Mặt trận Liên Việt Đáp án là: D. Mặt trận Liên Việt </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Ships can only reach Antarctica during a relatively short period because the extremely cold condition.
A. can only
B. during
C. relatively
D. because Đáp án là: D. because </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Which sentence below best expresses the essential information in the underlined sentence in paragraph 3? Incorrect choices change the meaning in important ways or leave out essential information.
A.Clothing serves a physical purpose, while costume has a personal, social, or psychological function.
B.We like clothing to fit our body well, but different costumes fit differently depending on the purpose.
C.Both clothing and costume are types of attire, but it is often difficult to distinguish between them.
D. People spend more time in choosing special costumes than they do in selecting everyday clothing. Đáp án là: A.Clothing serves a physical purpose, while costume has a personal, social, or psychological function. </s> | [
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274,
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29884,
298,
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29875,
29901,
8449,
10541,
2400,
1900,
4653,
267,
278,
18853,
2472,
297,
278,
109... | [
1,
1,
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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 correct answer to each of the following questions. You are old enough to take _____ for what you have done.
A. responsible
B. responsibility
C. responsibly
D. irresponsible Đáp án là: B. responsibility </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Nếu từ thông qua khung dây dẫn kín tăng thêm một lượng là 0,09 Wb trong khoảng thời gian 3 ms và dòng điện cảm ứng xuất hiện trong khung dây có cường độ là 3 A thì điện trở trong của khung dây là
A. 15 Ω
B. 30 Ω
C. 10 Ω
D. 60 Ω Đáp án là: C. 10 Ω </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Chọn phát biểu đúng:
A. Thành phần chính của quặng đolomit là CaCO 3 và MgCO 3
B. Có thể dùng dung dịch HCl để làm mềm nước cứng tạm thời
C. Dung dịch NaHCO 3 làm mềm nước cứng vĩnh cửu
D. Thạch cao sống có thành phần chính là CaSO 4.H 2 O Đáp án là: A. Thành phần chính của quặng đolomit là CaCO 3 và MgCO 3 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Phương pháp dùng để chưng cất dầu mỏ là:
A. Chưng cất dưới áp suất thường.
B. Chưng cất dưới áp suất cao.
C. Chưng cất dưới áp suất thấp.
D. Chưng cất lôi cuốn hơi nước. Đáp án là: A. Chưng cất dưới áp suất thường. </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Cho các polime sau: (1) polietilen (PE); (2) poli (vinyl clorua) (PVC); (3) cao su lưu hóa; (4) polistiren (PS); (5) amilozơ; (6) amilopectin; (7) xenlulozơ. Số polime có cấu trúc mạch không phân nhánh là
A. 7.
B. 5
C. 4
D. 6 Đáp án là: A. 7. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Làm tròn số 89 000 đến hàng chục nghìn
A. 60 000
B. 70 000
C. 80 000
D. 90 000 Đáp án là: D. 90 000 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Khi so sánh phản ứng hạt nhân và phản ứng hóa học, phát biểu nào sau đây là sai?
A. Hai loại phản ứng đều tạo ra các nguyên tố mới từ các nguyên tố ban đầu
B. Phản ứng phóng xạ không điều chỉnh tốc độ được như một số phản ứng hóa học
C. Phản ứng hạt nhân và phản ứng hóa học đều có thể tỏa hoặc thu nhiệt
D. Phản ứng hóa học chỉ xảy ra ở vỏ các nguyên tử, còn phản ứng hạt nhân xảy ra trong hạt nhân Đáp án là: A. Hai loại phản ứng đều tạo ra các nguyên tố mới từ các nguyên tố ban đầu </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Choose the letter A, B, C or D to complete the sentences with given words There/ house/ tree/ our/ is/ behind/ a.
A. There our tree is behind a house.
B. There a house behind is our tree.
C. There is our house behind tree a.
D. There is a tree behind our house. Đáp án là: D. There is a tree behind our house </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Giving lucky money to the young and the old at Tet is a common ________.
A. attitude
B. tradition
C. behavior
D. practice Đáp án là: B. tradition </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Có bao nhiêu ý mô tả về sinh vật biến đổi gen dưới đây? (1) Giống lúa “gạo vàng” có khả năng tổng hợp - caroten trong hạt. (2) Vi khuẩn E.Coli mang gen mã hóa insulin ở người. (3) Chuột nhắt mang gen hoocmon sinh trưởng của chuột cống nên có khối lượng gần g ấ p đôi so với con chuột bình thường cùng lứa. (4) Tạo được chủng nấm penicilium đột biến có hoạt tính penicilin tăng gấp 200 lần dạng ban đầu. Tạo được chủng vi khuẩn đột biến có năng suất tổng họp lyzin cao gâp 300 lần dạng ban đầu.
A. 3
B. 2
C. 1
D. 4 Đáp án là: D. 4 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Nội dung nào sau đây không phản ánh đúng đặc điểm của Biển Đông?
A. Nằm ở rìa tây của Thái Bình Dương.
B. Là vùng biển chung của 11 quốc gia Đông Nam Á.
C. Là “cầu nối” giữa Thái Bình Dương và Ấn Độ Dương.
D. Là biển lớn thứ tư trên thế giới với diện tích khoảng 3,5 triệu Km 2. Đáp án là: B. Là vùng biển chung của 11 quốc gia Đông Nam Á. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho các đơn thức sau: (-x)^2 yz^2,(-5x)^2y^2z^2, -1/2x^2yz^2, 3xy^2z và 7x^2y^2z. Số đơn thức đồng dạng với đơn thức 3/2 x^2yz^2là:
A. 0
B. 1
C. 2
D. 3 Đáp án là: C. 2 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Nhận định nào sau đây không đúng với công nghiệp khai thác khoáng sản ở Cộng hòa Nam Phi?
A. Đóng góp lớn nhất vào GDP của đất nước.
B. Tạo ra nhiều việc làm cho người lao động.
C. Khai thác nhiều quặng kim loại và than đá.
D. Đứng đầu thế giới về khai thác kim cương. Đáp án là: A. Đóng góp lớn nhất vào GDP của đất nước. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Which of the following words is not an acronym?
A. CANCER
B. CARE
C. LASER
D. AIDS Đáp án là: A. CANCER </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một viên bi sắt có đường kính 2 cm ngập trong một cốc chứa 100 ml axit có pH = 0, phản ứng xảy ra hoàn toàn. Bán kính viên bi sắt sau phản ứng (coi rằng viên bi bị mòn đều từ mọi phía, khối lượng riêng của sắt là 7,8 g/cm 3 )là:
A. 0,56cm
B. 0,84cm
C. 0,78cm
D. 0,97cm Đáp án là: D. 0,97cm </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Sông nào sau đây có diện tích lưu vực rộng nhất thế giới?
A. Nin.
B. I-ê-nit-xây.
C. A-ma-dôn.
D. Mê Công. Đáp án là: C. A-ma-dôn. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: According to paragraph 3, which is one of the patent years of Beard’s modified couplers?
A. 1884
B. 1873
C. 1897
D. 1905 Đáp án là: C. 1897 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Từ các điểm A, B, C, D, E không thẳng hàng, ta có thể lập được bao nhiêu tam giác mà các đỉnh của tam giác được lấy từ 5 điểm A, B, C, D, E?
A. \(C_5^3 = 10\);
B. \(A_5^3 = 60\);
C. \({P_5} = 120\);
D. \({P_3} = 6\). Đáp án là: A. \(C_5^3 = 10\); </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Trâu, bò, ngựa, thỏ,... đều ăn cỏ nhưng lại có prôtêin và các tính trạng khác nhau do
A. Bộ máy tiêu hoá của chúng khác nhau.
B. Chúng có ADN khác nhau về trình tự sắp xếp các nuclêôtit.
C. Cơ chế tổng hợp prôtêin khác nhau.
D. có quá trình trao đổi chất khác nhau. Đáp án là: B. Chúng có ADN khác nhau về trình tự sắp xếp các nuclêôtit. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: What can we infer from the article?
A. To make a piece of papyrus, you need to put strips of pith parallel over each other
B. Ancient Egypt didn’t like trading.
C. In the ancient times, the Egyptians possessed a basic commercial awareness.
D. Papyrus was used within ancient Egypt only. Đáp án là: C. In the ancient times, the Egyptians possessed a basic commercial awareness. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho bảng số liệu sau: Tỉ lệ dân cư thành thị và nông thôn thời kì 1900 – 2005 ( Đơn vị: % ) Căn cứ vào bảng số liệu, cho biết nhận xét nào sau đây đúng về tỉ lệ dân cư thành thị và nông thôn thời kì 1900 – 2005?
A. Tỉ lệ dân nông thôn có xu hướng tăng.
B. Tỉ lệ dân thành thị có xu hướng giảm.
C. Dân nông thôn luôn chiếm tỉ trọng cao hơn dân thành thị.
D. Năm 2005, dân nông thôn cao hơn dân thành thị gấp 2 lần. Đáp án là: C. Dân nông thôn luôn chiếm tỉ trọng cao hơn dân thành thị. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Độ cao của âm phụ thuộc vào yếu tố nào sau đây?
A. Độ đàn hồi của âm.
B. Biên độ dao động của nguồn âm.
C. Tần số của nguồn âm.
D. Đồ thị dao động của nguồn âm. Đáp án là: C. Tần số của nguồn âm. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: His choice of future career is quite similar____________ mine.
A. for
B. to
C. with
D. at Đáp án là: B. to </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Để xác định nhiệt độ của một lò nung, người ta đưa vào trong lò một miếng sắt có khối lượng 100g. Khi miếng sắt có nhiệt độ bằng nhiệt độ của lò, người ta lấy ra và thả nó vào một nhiệt lượng kế chứa 500g nước ở nhiệt độ 20 0 C. Khi đó nhiệt độ của nước tăng thêm 10 0 C, biết nhiệt dung riêng của sắt là 478J/kg.K, của nước là 4180J/kg.K. Nhiệt độ của lò xấp xỉ bằng:
A. 467, 2 0 C
B. 407, 2 0 C
C. 967 0 C
D. 813 0 C Đáp án là: C. Khi đó nhiệt độ của nước tăng thêm 10 0 C, biết nhiệt dung riêng của sắt là 478J/kg.K, của nước là 4180J/kg.K. Nhiệt độ của lò xấp xỉ bằng:A. 467, 2 0 CB. 407, 2 0 C </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một hình vuông có cạnh dài 25cm có diện tích là
A. 100 cm^2
B. 625cm^2
C. 50cm^2
D.250cm^2 Đáp án là: B. 625cm^2 </s> | [
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1,
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<s> Chọn đáp án đúng với câu hỏi: Ở một loài thực vật, tính trạng màu hoa do 3 cặp gen (A,a; B, b; D,d) phân li độc lập quy định, khi trong kiểu gen có mặt các alen A, B, D quy định hoa đỏ; các kiểu gen còn lại quy định hoa trắng. Tính trạng hình dạng hạt do một cặp gen quy định trong đó alen E quy định quả tròn, alen e quy định quả dài. Phép lai P: AaBBDdEe × AaBbDdEe, thu được F 1. Biết rằng không xảy ra đột biến. Theo lí thuyết, ở F 1 tối đa có bao nhiêu kiểu gen quy định kiểu hình hoa trắng, quả tròn?
A. 20
B. 28
C. 16
D. 8 Đáp án là: A. 20 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cách mắc vôn kế nào sau đây là đúng?
A. 1, 2 và 3
B. 1 và 4
C. 2 và 3
D. 1, 2, 3 và 4 Đáp án là: C. 2 và 3 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Đun nóng 1,91 gam hỗn hợp X gồm C 3 H 7 Cl và C 6 H 5 Cl với dung dịch NaOH loãng vừa đủ, sau đó thêm tiếp dung dịch AgNO 3 đến dư vào hỗn hợp sau phản ứng, thu được 1,435 gam kết tủa. Khối lượng C 6 H 5 Cl trong hỗn hợp đầu là :
A. 1,125 gam.
B. 1,570 gam.
C. 0,875 gam.
D. 2,250 gam. Đáp án là: A. 1,125 gam. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho AC = 2 cm; AB = 8 cm; BC = a cm (a ∈ N). Có bao nhiêu giá trị của a để ABC là tam giác?
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: Hội nghị thượng đỉnh về Trái Đất được tổ chức năm 1992 ở thành phố nào sau đây?
A. Luân Đôn.
B. Rio de Janero.
C. La Hay.
D. New York. Đáp án là: B. Rio de Janero. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Ion nào sau đây không có cấu hình electron giống của khí hiếm?
A. Mg 2 + 12
B. Na + 11
C. Fe 2 + 11
D. Cl - 17 Đáp án là: C. Fe 2 + 11 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Elip (E):(x^2)/100+(y^2)/64=1 có độ dài trục bé bằng:
A. 8
B. 10
C. 16
D. 20 Đáp án là: C. 16 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho tập A có n phần tử (n ∈ N, n ≥ 2), k là số nguyên thỏa mãn 1 ≤ k ≤ n. Mỗi chỉnh hợp chập k của n phần tử đã cho là
A. Một kết quả của sự sắp xếp thứ tự n phần tử của tập hợp A;
B. Tất cả các kết quả của việc lấy k phần tử từ n phần tử của tập hợp A và sắp xếp chúng theo một thứ tự nào đó;
C. Một kết quả của việc lấy k phần tử từ n phần tử của tập hợp A và sắp xếp chúng theo một thứ tự nào đó;
D. Một số được tính bằng n(n – 1)... (n – k + 1). Đáp án là: C. Một kết quả của việc lấy k phần tử từ n phần tử của tập hợp A và sắp xếp chúng theo một thứ tự nào đó; </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Scientists have _______ a lot of research into renewable energy sources.
A. carried
B. done
C. solved
D. made Đáp án là: B. done </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Thế nào là từ trái nghĩa?
A. Là những từ có nghĩa trái ngược nhau
B. Là những từ có nghĩa gần nhau
C. Là những từ có nghĩa giống nhau
D. Cả 3 đáp án trên Đáp án là: A. Là những từ có nghĩa trái ngược nhau </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Môi trường ôn đới lục địa có đặc điểm nào sau đây?
A. Mùa đông kéo dài và có tuyết phủ, mùa hạ nóng và có mưa.
B. Mùa hạ mát, mùa đông không lạnh lắm.
C. Mùa đông không lạnh lắm và có mưa, mùa hạ nóng và khô.
D. Có mưa lớn sườn đón gió, thực vật thay đổi theo độ cao. Đáp án là: A. Mùa đông kéo dài và có tuyết phủ, mùa hạ nóng và có mưa. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Tế bào mạch gỗ của cây gồm
A. Quản bào và tế bào nội bì
B. Quản bào và tế bào lông hút
C. Quản bào và mạch ống
D. Quản bào và tế bào biểu bì Đáp án là: C. Quản bào và mạch ống </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Sau Chiến tranh thế giới thứ nhất, xã hội Việt Nam tồn tại nhiều mâu thuẫn, trong đó chủ yếu là mâu thuẫn giữa
A. nông dân với địa chủ phong kiến.
B. công nhân với tư bản mại bản.
C. nhân dân Việt Nam với Pháp và tay sai.
D. tư sản dân tộc với tư sản mại bản. Đáp án là: C. nhân dân Việt Nam với Pháp và tay sai. </s> | [
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Một miếng gỗ hình tròn, bán kính 4cm. Ở tâm O, cắm một chiếc đinh OA dài 6cm, vuông góc với miếng gỗ, thả miếng gỗ nổi trong một chậu nước có chiết suất 1,33 (đỉnh OA ở trong nước). Mắt đặt trong không khí sẽ thấy đầu A cách mặt nước một khoảng lớn nhất là
A. 3,64cm
B. 4,39cm
C. 6cm
D. 8,74cm Đáp án là: A. 3,64cm </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một người quan sát trên mặt biển thấy chiếc phao nhô lên cao 10 lần Trong 36 (s) và đo được khoảng cách hai đỉnh lân cận là 10 m. Tính tốc độ truyền sóng trên mặt biển.
A. v = 2,5 m/s.
B. v = 5 m/s.
C. v = 10 m/s.
D. v = 1,25 m/s. Đáp án là: A. v = 2,5 m/s. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cation X + có cấu hình electron ở phân lớp ngoài cùng là 2 p 6. Kết luận sai là
A. X là nguyên tố kim loại.
B. hạt nhân nguyên tử X có 11 proton.
C. lớp ngoài cùng của X có 5 electron.
D. X nằm ở chu kì 3 trong bảng tuần hoàn. Đáp án là: C. lớp ngoài cùng của X có 5 electron. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: The word ‘’ expensive ’’ in the second paragraph is closet in meaning to.........
A. old
B. cheap
C. costly
D. new Đáp án là: C. costly </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Vấn đề có ý nghĩa hàng đầu trong việc phát triển nông nghiệp theo chiều sâu ở Đông Nam Bộ là
A. lao động.
B. giống cây trồng.
C. bảo vệ rừng.
D. thuỷ lợi. Đáp án là: D. thuỷ lợi </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Tổng số liên kết xich ma trong CH 3 COOCH=CH 2 là?
A. 9
B. 13
C. 10
D. 11 Đáp án là: D. 11 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: “Why did you apply for the job?” her mother asked.
A. Her mother wanted to know the reason she applied for the job.
B. Her mother wanted to know the reason she had applied for the job.
C. Her mother wanted to know why did she apply for the job.
D. Her mother wanted to know why had she applied for the job. Đáp án là: B. Her mother wanted to know the reason she had applied for the job. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Gọi x là giá trị thỏa mãn (3x – 4)(x – 2) = 3x(x – 9) – 3. Khi đó
A. x < 0
B. x < -1
C. x > 2
D. x > 0 Đáp án là: A. x < 0 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: You will spend a significant amount of your life at work, so to enjoy your job, remain motivated, and fulfil your potential, you need to make your career (1) ______ wisely.
A. selections
B. choices
C. alternatives
D. elections Đáp án là: B. choices </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Dịch bệnh HIV/AIDS, Ê-bô-la,... bắt đầu từ châu lục nào?
A. Châu Âu.
B. Châu Á.
C. Châu Phi.
D. Châu Mĩ Đáp án là: C. Châu Phi. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: He failed the final exam last year because his laziness.
A. failed
B. the final exam
C. because
D. laziness Đáp án là: C. because </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Nghiệm của đa thức f(x) = 2x – 8 là
A. –6.
B. –4.
C. 0.
D. 4. Đáp án là: D. 4 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: His parents made him study for his exams.
A. He was obliged to study for the exam by his parents.
B. He was made to study for the exam by his parents.
C. He is made to study for the exam by his parents.
D. He was made study for the exam by his parents. Đáp án là: B. He was made to study for the exam by his parents. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một nguyên tử X có tổng số e ở các phân lớp p là 11. Hãy cho biết X thuộc về nguyên tố hoá học nào sau đây?
A. nguyên tố s.
B. nguyên tố p.
C. nguyên tố d.
D. nguyên tố f. Đáp án là: B. nguyên tố p. </s> | [
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1,
1,
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1,
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1,
1,
1,
1,
1,
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<s> Chọn đáp án đúng với câu hỏi: Một nhà vật lý hạt nhân làm thí nghiệm xác định chu kì bán rã (T) của một chất phóng xạ bằng cách dùng máy đếm xung để đo tỉ lệ giữa số hạt bị phân rã (ΔN) và số hạt ban đầu (N 0 ). Dựa vào kết quả thực nghiệm đo được trên hình vẽ, hãy tính T?
A. 138 ngày.
B. 5,6 ngày.
C. 3,8 ngày.
D. 8,9 ngày. Đáp án là: D. 8,9 ngày </s> | [
1,
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1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Barry continued to smoke even though we had advised him to quit.
A. Barry took our advice so he stopped smoking.
B. If we had advised Barry, he would have quit smoking.
C. Barry did not quit smoking because of our advice.
D. Despite being told not to smoke, Barry continued to do. Đáp án là: A. Barry took our advice so he stopped smoking. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Phát biểu nào sau đây là đúng khi nói về diễn thế sinh thái
A. Diễn thế nguyên sinh xảy ra ở môi trường đã có một quần xã sinh vật nhất định.
B. Diễn thế thứ sinh xảy ra ở môi trường mà trước đó chưa có một quần xã sinh vật nào.
C. Trong diễn thế sinh thái, sự biến đổi của quần xã diễn ra độc lập với sự biến đổi điều kiện ngoại cảnh.
D. Trong diễn thế sinh thái, các quẩn xã sinh vật biến đổi tuần tự thay thế lẫn nhau. Đáp án là: D. Trong diễn thế sinh thái, các quẩn xã sinh vật biến đổi tuần tự thay thế lẫn nhau </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Ngành công nghiệp không xuất hiện trong cơ cấu ngành của trung tâm công nghiệp Xanh Pê-téc-bua là:
A.đóng tàu.
B. sản xuất ô tô.
C. hóa chất.
D. thực phẩm. Đáp án là: B. sản xuất ô tô. </s> | [
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1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: The people at the party were worried about Janet because no one was aware_____ she had gone.
A. where that
B. of where
C. of the place
D. the place Đáp án là: B. of where </s> | [
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<s> Chọn đáp án đúng với câu hỏi: A calorie is a measure of the heat required to (29) ________ the temperature of one gram of water one degree centigrade.
A. produce
B. raise
C. lower
D. change Đáp án là: B. raise </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Đặc điểm lớn nhất của cách mạng khoa học - công nghệ là
A. công nghệ trở thành yếu tố cơ bản của sản xuất.
B. công nghệ trở thành lực lượng sản xuất trực tiếp
C. khoa học trở thành lực lượng sản xuất trực tiếp.
D. kĩ thuật trở thành lực lượng sản xuất trực tiếp. Đáp án là: C. khoa học trở thành lực lượng sản xuất trực tiếp. </s> | [
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1,
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<s> Chọn đáp án đúng với câu hỏi: As an orphan, he _____ earn his living alone.
A. have to
B. has had to
C. ought to
D. had to Đáp án là: B. has had to </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Tìm x, biết: 27. x = 108
A. 6
B. 5
C. 4
D. 3 Đáp án là: C. 4 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Kết quả của phép tính: 2 x 2 + 20 là:
A. 44
B. 24
C. 82
D. 28 Đáp án là: B. 24 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Henry sống ở thế kỷ nào?
A. XVI - XVII
B. XVIII - XIX
C. XIX - XX
D. XX - XXI Đáp án là: C. XIX - XX </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Where in the passage does the author give an example of a new development in advertising?
A. Paragraph 1
B. Paragraph 2
C. Paragraph 3
D. Paragraph 5 Đáp án là: D. Paragraph 5 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: So sánh tính bazo nào sau đây là đúng?
A. C 2 H 5 NH 2 > CH 3 NH 2 > C 6 H 5 NH 2.
B. C 6 H 5 NH 2 > C 2 H 5 NH 2.
C. CH 3 NH 2 > NH 3 > C 2 H 5 NH 2.
D. C 6 H 5 NH 2 > CH 3 NH 2 > NH 3. Đáp án là: A. C 2 H 5 NH 2 > CH 3 NH 2 > C 6 H 5 NH 2. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Điền số thích hợp vào chỗ trống. Điểm O là trung điểm của đoạn thẳng MN. O chia đoạn thẳng MN thành... phần bằng nhau.
A. 1
B. 2
C. 3
D. 4 Đáp án là: B. 2 </s> | [
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29875,
31343,
29876,
269,
30984,
266,
18353,
298,
31645... | [
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<s> Chọn đáp án đúng với câu hỏi: Tính nhẩm: 20 x 4 =?
A. 60
B. 70
C. 80
D. 90 Đáp án là: C. 80 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Trên một sợi dây đàn hồi dài 1 m, hai đầu cố định, đang có sóng dừng với 5 nút sóng (kể cả hai đầu dây). Khoảng cách giữa hai nút sóng liên tiếp bằng
A. 0,25 m.
B. 1,5 m.
C. 0,5 m.
D. 1 m. Đáp án là: A. 0,25 m. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Các hoạt động của con người làm giảm sút độ đa dạng sinh học là
A. Phá rừng, khai thác gỗ, du canh, di dân khai hoang, nuôi trồng thủy sản, xây dựng đô thị, làm mất môi trường sống của động vật
B. Sử dụng tràn lan thuốc trừ sâu, việc thải các chất thải của các nhà máy gây ô nhiễm môi trường
C. Sự săn bắn động vật hoang dã
D. Tất cả các hoạt động trên Đáp án là: D. Tất cả các hoạt động trên </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.
A. m i ld
B. m i ldew
C. m i le
D. p i le Đáp án là: B. m i ldew </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Giá trị của biểu thức B = 3 – sin^290° + 2cos^260° – 3tan^245° bằng:
A. 2;
B.\(\frac{1}{2}\);
C. \( - \frac{1}{2}\);
D. 0. Đáp án là: C. \( - \frac{1}{2}\); </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Vật phát ra âm khi nào?
A. Khi nén vật
B. Khi làm vật dao động
C. Khi uốn cong vật
D. Khi kéo căng vật Đáp án là: B. Khi làm vật dao động </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Tìm từ đồng nghĩa với từ được gạch chân The food was delicious.
A. normal
B. good
C. terrible
D. dirty Đáp án là: B. good </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Trong các phát biểu dưới đây, phát biểu nào sai?
A. Điện phổ cho ta biết sự phân bố các đường sức của điện trường.
B. Các đường sức của điện trường đều là các đường thẳng song song và cách đều nhau.
C. Khi một điện tích chuyển động trong điện trường từ điểm M đến điểm N thì công của lực điện trường càng lớn khi quãng đường đi từ M đến N của điện tích càng dài.
D. Nói chung,các đường sức điện xuất phát từ các điện tích dương,tận cùng tại các điện tích âm. Đáp án là: C. Khi một điện tích chuyển động trong điện trường từ điểm M đến điểm N thì công của lực điện trường càng lớn khi quãng đường đi từ M đến N của điện tích càng dài. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một con lắc đơn có khối lượng quả cầu nhỏ là 2 g dao động điều hoà trong điện trường đều mà các đường sức điện có phương ngang, cường độ điện trường E = 4,9.10 4 V / m. Biết ban đầu quả cầu chưa tích điện, sau đó tích điện q = 2\[\sqrt 5 \].10 –7 C, gia tốc trọng trường g = 9,8 m/s 2. Tỉ số chu kì dao động của con lắc trước và sau khi tích điện cho quả cầu là
A. \[\frac{{\sqrt 5 }}{2}\].
B. \[\frac{{\sqrt 3 }}{2}\].
C. \[\frac{{\sqrt 6 }}{{\sqrt 2 }}\].
D. \[\sqrt {1,5} \]. Đáp án là: D. \[\sqrt {1,5} \] </s> | [
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<s> Chọn đáp án đúng với câu hỏi: _______ is not clear to researchers.
A. Why dinosaurs having become extinct.
B. Why dinosaurs became extinct
C. Did dinosaurs become extinct
D. Dinosaurs became extinct Đáp án là: B. Why dinosaurs became extinct </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cặp từ nào sau đây không phải là từ trái nghĩa?
A. Ra - Vào.
B. Đẹp - Xấu.
C. Chạy - Nhảy.
D. Lở - Bồi. Đáp án là: C. Chạy - Nhảy. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: ____ the photograph of the modern architecture of the mansion, I had no desire to go there.
A. Seeing
B. Being seen
C. To see
D. Having seen Đáp án là: D. Having seen </s> | [
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<s> Chọn đáp án đúng với câu hỏi: X, Y, Z là 3 este mạch hở (trong đó X, Y đơn chức, Z hai chức). Đun nóng 19,28 gam hỗn hợp E chứa X, Y, Z với dung dịch NaOH vừa đủ, thu được hỗn hợp F chỉ chứa 2 muối có tỉ lệ số mol 1 : 1 và hỗn hợp 2 ancol no, có cùng số nguyên tử cacbon. Dẫn toàn bộ hỗn hợp 2 ancol này qua bình đựng Na dư, thấy khối lượng bình tăng 8,1 gam. Đốt cháy toàn bộ F thu được CO 2, 0,39 mol H 2 O và 0,13 mol Na 2 CO 3. Các phản ứng xảy ra hoàn toàn. Phần trăm khối lượng của este có khối lượng phân tử nhỏ nhất trong E là
A. 3,84%.
B. 3,92%.
C. 3,96%.
D. 3,78%. Đáp án là: A. 3,84%. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Hoà tan m gam hỗn hợp gồm Al, Fe vào dung dịch H 2 SO 4 loãng (dư). Sau khi các phản ứng xảy ra hoàn toàn, thu được dung dịch X. Cho dung dịch Ba(OH) 2 (dư) vào dung dịch X, thu được kết tủa Y. Nung Y trong không khí đến khối lượng không đổi, thu được chất rắn Z là :
A. hỗn hợp gồm Al 2 O 3 và Fe 2 O 3
B. hỗn hợp gồm BaSO 4 và Fe 2 O 3
C. hỗn hợp gồm BaSO 4 và FeO
D. Fe 2 O 3 Đáp án là: B. hỗn hợp gồm BaSO 4 và Fe 2 O 3 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: John’s information ________ us a lot.
A. help
B. has helped
C. have helped
D. were helping Đáp án là: B. has helped </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Bài thơ Đồng dao mùa xuân viết về nội dung gì?
A. Viết về người nông dân của làng quê Việt Nam thời kháng chiến
B. Viết về người lính dưới góc nhìn chiêm nghiệm của một con người thời bình
C. Viết về cảm xúc trước mùa xuân thiên nhiên đất nước của tác giả
D. Thể hiện lòng thành kính, biết ơn của tác giả với lãnh tụ Hồ Chí Minh Đáp án là: B. Viết về người lính dưới góc nhìn chiêm nghiệm của một con người thời bình </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Trong một mạch dao động điều hòa, khi điện tích của tụ có độ lớn cực đại thì điều nào sau đây là không đúng
A. Từ trường trong lòng cuộn cảm bằng 0
B. Cường độ dòng điện trong mạch đạt giá trị cực đại
C. Năng lượng điện trong tụ đạt giá trị cực đại
D. Năng lượng điện trường trong tụ bằng năng lượng điện từ của mạch Đáp án là: B. Cường độ dòng điện trong mạch đạt giá trị cực đại </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Đặt điện áp xoay chiều u = U o cos ω t vào hai đầu đoạn mạch chỉ có tụ điện. Nếu điện dung của tụ điện không đổi thì dung kháng của tụ
A. Lớn khi tần số của dòng điện lớn.
B. Nhỏ khi tần số của dòng điện lớn.
C. Nhỏ khi tần số của dòng điện nhỏ.
D. Không phụ thuộc vào tần số của dòng điện. Đáp án là: B. Nhỏ khi tần số của dòng điện lớn. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Ở một loài loài (2n = 46), Một trong số các hợp tử này nguyên phân liên tiếp 5 đợt ở kì giữa của lần nguyên phân thứ 5, người ta đếm được trong các tế bào con có 1504 cromatit. Hợp tử này là dạng đột biến nào?
A. Thể bốn.
B. Thể ba.
C. Thể không.
D. Thể một. Đáp án là: B. Thể ba. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Despite having a bigger and cheaper choice of healthy foods, many Americans have lost a lot of weight.
A. acquire
B. win
C. gained
D. obtain Đáp án là: C. gained </s> | [
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