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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. r ea dy
B. h ea vy
C. b ea ch
D. h ea d Đáp án là: C. b ea ch </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Phát biểu nào sau đây về tính chất của sóng điện từ là không đúng?
A. Sóng điện từ truyền được trong môi trường vật chất kể cả chân không.
B. Sóng điện từ mang năng lượng.
C. Sóng điện từ có thể (phản xạ, khúc xạ, giao thoa)
D. Sóng điện từ là sóng dọc, trong quá trình truyền sóng, các véctơ và vuông góc với nhau và vuông góc với phương truyền sóng Đáp án là: D. Sóng điện từ là sóng dọc, trong quá trình truyền sóng, các véctơ và vuông góc với nhau và vuông góc với phương truyền sóng </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Đốt cháy hoàn toàn một lượng chất hữu cơ X thu được 13,44 lít khí CO 2, 2,24 lít khí N 2 (các khí đo ở đktc) và 12,6 gam H 2 O. Khi X tác dụng với dung dịch NaOH thu được sản phẩm có muối H 2 NCH 2 COONa. Công thức cấu tạo thu gọn của X là:
A. H 2 NCH 2 COOCH 3.
B. H 2 NCH 2 CH 2 COOH.
C. H 2 NCH 2 COOC 3 H 7.
D. H 2 NCH 2 COOC 2 H 5. Đáp án là: A. H 2 NCH 2 COOCH 3. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Người phương Đông cổ đại đều dùng chữ
A. Latinh
B. tượng thanh
C. tượng ý
D. tượng hình Đáp án là: D. tượng hình </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Sơ đồ nào sau đây là đúng với quy trình sản xuất inteferon? (1) Gắn IFN vào ADN phago tạo ra phago tái tổ hợp (2) Nhiễm phago tái tổ hợp vào E. coli (3) Nuôi E. coli nhiễm phago tái tổ hợp trong một nồi lên men (4) Tách gen IFN ở người Phương án đúng là
A. 4 → 1 → 2 → 3
B. 3 → 2 → 4 → 1
C. 4 → 2 → 3 → 1
D. 3 → 4 → 2 → 1 Đáp án là: A. 4 → 1 → 2 → 3 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Trong cuộc Tiến công chiến lược Đông - Xuân 1953 - 1954, quân đội và nhân dân Việt Nam thực hiện kế sách gì để đối phó với kế hoạch Nava?
A. Lừa địch để đánh địch.
B. Đánh điểm, diệt viện.
C. Đánh vận động và công kiên.
D. Điều địch để đánh địch. Đáp án là: D. Điều địch để đánh địch </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho các phát biểu sau: (a) Peptit và amino axit đều có tính lưỡng tính. (b) Anilin có tính bazo, dung dịch anilin có thể làm hồng phenolphtalein. (c) Anilin là nguyên liệu quan trọng trong công nghiệp phẩm nhuộm, polime, dược phẩm. (d) Chỉ dùng dung dịch KMnO 4 có thể phân biệt được toluen, benzen và stiren. (e) Tơ nitron (hay olon) được dùng để dệt vải may quần áo ấm hoặc bện thành sợi “len” đan áo rét. (f) Trong phản ứng tráng gương, glucozo đóng vai trò chất oxi hóa. (g) Tơ visco, tơ axetat là tơ tổng hợp. (h) Sản phẩm thủy phân xenlulozo (xt, H +, t o ) có thể tham gia phản ứng tráng gương. Số phát biểu đúng là:
A. 5
B. 4
C. 3
D. 6 Đáp án là: A. 5 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cơ cấu GDP phân theo khu vực kinh tế của các nước phát triển có đặc điểm là
A. khu vực I và III cao, Khu vực II thấp
B. khu vực II rất cao, Khu vực I và III thấp
C. khu vực I rất thấp, Khu vực II và III cao
D. khu vực I rất thấp, Khu vực III rất cao Đáp án là: D. khu vực I rất thấp, Khu vực III rất cao </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Phát biểu nào sau đây không đúng về nguồn lao động nước ta?
A. Có kinh nghiệm sản xuất phong phú trong công nghiệp.
B. Chất lượng lao động ngày càng được nâng lên.
C. Thiếu nhiều công nhân kĩ thuật lành nghề.
D. Nguồn lao động dồi dào, tăng nhanh. Đáp án là: A. Có kinh nghiệm sản xuất phong phú trong công nghiệp. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Trong hệ đơn vị SI, công được đo bằng:
A. cal.
B. W.
C. J.
D. W/s. Đáp án là: C. J. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Đâu là nguyên nhân trực tiếp dẫn tới bùng nổ cuộc cách mạng 1905 - 1907 ở Nga?
A. Sự phát triển của phong trào đấu tranh cuối năm 1904
B. Công nhân Xanh Pêtécbua biểu tình thỉnh cầu Nga hoàng cải thiện đời sống
C. Vụ thảm sát “Ngày chủ nhật đẫm máu” của quân đội và cảnh sát Nga
D. Nước Nga thất bại trong cuộc Chiến tranh Nga – Nhật (1904 – 1905) Đáp án là: C. Vụ thảm sát “Ngày chủ nhật đẫm máu” của quân đội và cảnh sát Nga </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một ô tô đang chạy thì tắt máy đột ngột, xe chạy thêm một đoạn nữa rồi dừng hẳn. Định luật bảo toàn năng lượng trong trường hợp này có đúng không?
A. Đúng, vì thế năng của xe luôn không đổi.
B. Đúng, vì động năng của xe đã chuyển hóa thành dạng năng lượng khác do ma sát.
C. Không đúng, vì động năng của xe giảm dần.
D. Không đúng, vì khi tắt máy động năng của xe đã chuyển hóa thành thế năng. Đáp án là: B. Đúng, vì động năng của xe đã chuyển hóa thành dạng năng lượng khác do ma sát. </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... |
<s> Chọn đáp án đúng với câu hỏi: Điều kiện cần và đủ để điểm M(x; y) nằm trên đường thẳng d đi qua điểm M(x_0; y_0) và có vectơ pháp tuyến \(\vec n\left( {A,B} \right)\) là
A. A(x – x_0) + B(y_0 – y) = 0;
B. x_0(x – A) + y_0(y – B) = 0;
C. B(x – x_0) + A(y – y_0) = 0;
D. A(x – x_0) + B(y – y_0) = 0. Đáp án là: D. A(x – x_0) + B(y – y_0) = 0 </s> | [
1,
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29... | [
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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: Vectơ nào dưới đây là một vectơ chỉ phương của đường thẳng thẳng (x =8y= -3 +t ) là:
A. (0;1)
B. (8;-3)
C. (1; 1)
D. (0 ; -1) Đáp án là: A. (0;1) </s> | [
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1,
1,
1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in the position of the primary stress in each of the following questions.
A. acquaintance
B. unselfish
C. attraction
D. humorous Đáp án là: D. humorous </s> | [
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350,
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315,
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470,
360,
373,... | [
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1,
1,
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1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Sự phân bố các trung tâm thương mại không phụ thuộc vào yếu tố nào sau đây?
A. Quy mô dân số.
B. Nguồn lao động chất lượng cao.
C. Sức mua của người dân.
D. Sự phát triển của các hoạt động kinh tế. Đáp án là: B. Nguồn lao động chất lượng cao. </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Nhân vật chính trong truyện "Bức tranh của em gái tôi"?
A. Người em gái
B. Người em gái, anh trai
C. Bé Quỳnh
D. Người anh trai Đáp án là: B. Người em gái, anh trai </s> | [
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1,
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1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: When they get together, all they talk....................... is football.
A. to
B. with
C. about
D. on Đáp án là: C. about </s> | [
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1,
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338,... | [
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1,
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1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Trong dao động điều hòa, gia tốc của chất điểm bằng không khi:
A. Vận tốc có giá trị cực đại hoặc cực tiểu
B. Vận tốc bằng không
C. Li độ cực tiểu
D. Li độ cực đại Đáp án là: A. Vận tốc có giá trị cực đại hoặc cực tiểu </s> | [
1,
1,
29871,
678,
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1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Which of the following could be considered a cause of the distress signals of trees?
A. attacks by insects
B. experiments by scientists
C. torn roots
D. lack of water Đáp án là: D. lack of water </s> | [
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310,
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367,
5545,
263,
4556,
310,
278,
1320,
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1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: The word " prosperity " in line 1 could be best replaced by which of the following?
A. success
B. surplus
C. nurturing
D. education Đáp án là: A. success </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Trong các đặc trưng sau đây, đặc trưng nào là đặc trưng của quần xã sinh vật?
A. Nhóm tuổi.
B. Sự phân bố của các loài trong không gian.
C. Tỉ lệ giới tính.
D. Số lượng cá thể cùng loài trên một đơn vị diện tích hay thể tích. Đáp án là: B. Sự phân bố của các loài trong không gian. </s> | [
1,
1,
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1... |
<s> Chọn đáp án đúng với câu hỏi: Gió mùa đông nam ở đồng bằng Bắc Bộ chính là
A. gió mùa Tây Nam.
B. gió tây nam.
C. Tín phong bán cầu Nam.
D. gió Tây khô nóng. Đáp án là: A. gió mùa Tây Nam. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Điều đúng khi nói về đặc điểm cấu tạo của ADN là:
A. Là một bào quan trong tế bào
B. Chỉ có ở động vật, không có ở thực vật
C. Đại phân tử, có kích thước và khối lượng lớn
D. Cả A, B, C đều đúng Đáp án là: C. Đại phân tử, có kích thước và khối lượng lớn </s> | [
1,
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1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Pháp gây chiến tranh với Phổ năm 1879 nhằm mục đích gì?
A. Dùng chiến tranh để giải quyết những khó khăn trong nước
B. Ngăn cản nước Đức phát triển kinh tế
C. Khắc phục khủng hoảng trong nước và ngăn cản công cuộc thống nhất nước Đức
D. Chiếm đất, giành dân, mở rộng lãnh thổ của mình sang lãnh thổ nước Đức Đáp án là: C. Khắc phục khủng hoảng trong nước và ngăn cản công cuộc thống nhất nước Đức </s> | [
1,
1,
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678,
30975,
29876,
29871,
30128,
29976,
29886,
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29871,
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865,
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274,
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298,
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29875,
29901,
1963,
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30103,
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10364,
31500,
29891,
521,
347,
31500,
3010... | [
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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: Natural disasters will result _____________ crop failures and famine.
A. in
B. from
C. of
D. to Đáp án là: A. in </s> | [
1,
1,
29871,
678,
30975,
29876,
29871,
30128,
29976,
29886,
29871,
1715,
29871,
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865,
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298,
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29901,
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766,
1901,
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674,
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903,
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274,
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44... | [
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<s> Chọn đáp án đúng với câu hỏi: “I wouldn’t buy that dress if I were you; it isn’t in _____________ - “You’re right, it probably doesn’t suit me either.”
A. fashion
B. mode
C. style
D. trend Đáp án là: A. fashion </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Với giá trị nào của m thì phương trình x - 2 = 3m + 4 có nghiệm lớn hơn 3?
A. m ≥ 1
B. m ≤ 1
C. m > -1
D. m < -1 Đáp án là: C. m > -1 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Căn cứ vào Atlat Địa lí Việt Nam trang 9, cho biết tháng nào sau đây ở trạm khí tượng Sa Pa có lượng mưa lớn nhất?
A. Tháng VIII.
B. Tháng X.
C. Tháng XI.
D. Tháng IX Đáp án là: A. Tháng VIII. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: “Why did you waste your money on going to see that movie?” “I know. It’s the ____ film I’ve ever seen.”
A. worse
B. baddest
C. worst
D. bad Đáp án là: C. worst </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Hợp chất X (C, H, O) chứa một nhóm chức trong phân tử, không tác dụng với Na, tác dụng với NaOH có thể theo tỉ lệ 1 :1 hay 1:2. Khi đốt cháy 1 mol X cho 7 mol CO 2. Tìm công thức cấu tạo của X
A. C 2 H 5 COOC 4 H 9
B. C 3 H 7 COOC 3 H 7
C. HCOOC 6 H 5
D. Kết quả khác Đáp án là: C. HCOOC 6 H 5 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions.
A. expectedly
B. support
C. available
D. population Đáp án là: D. population </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Đặt điện áp xoay chiều vào hai đầu đoạn mạch AB theo thứ tự gồm cuộn dây không thuần cảm, tụ điện, điện trở thuần mắc nối tiếp. Gọi M là điểm nối giữa cuộn dây và tụ điện, N là điểm nối giữa tụ điện và điện AN vào dao động ký điện tử ta thu được đồ thị biểu diễn sự phụ thuộc của điện áp theo thời gian như hình vẽ. Biết cường độ dòng điện hiệu dụng trong mạch là I = 3A. Tổng điện trở thuần của mạch điện bằng:
A. 50 3 Ω
B. 100Ω
C. 150 3 Ω
D. 50Ω Đáp án là: D. 50Ω </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Dung dịch A chứa 2 axit H 2 SO 4 aM và HCl 0,2M. Dung dịch B chứa 2 bazơ NaOH 0,5M và Ba(OH) 2 0,25M. Biết 100 ml dung dịch A trung hoà 120 ml dung dịch B. Giá trị của a là
A. 0,5 M.
B. 1,0 M.
C. 0,75 M.
D. 0,25 M. Đáp án là: A. 0,5 M. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Nung một mẫu thép thường có khối lượng 10 gam trong O 2 dư thu được 0,1568 lít khí CO 2 (đktc). Thành phần phần trăm theo khối lượng của cacbon trong mẫu thép đó là
A. 0,82%
B. 0,84%.
C. 0,88%.
D. 0,86%. Đáp án là: B. 0,84%. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: I will need _______ about the climate before I make a final decision.
A. a few informations
B. a little informations
C. a few information
D. a little information Đáp án là: D. a little information </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho các nhân tố sau: (1) Chọn lọc tự nhiên (2) Giao phối ngẫu nhiên (3) Giao phối không ngẫu nhiên (4) Các yếu tố ngẫu nhiên (5) Đột biến (6) Di-nhập gen Các nhân tố vừa làm thay đổi tần số alen vừa làm thay đổi thành phần kiểu gen của quần thể là
A. 1,2,4,5
B. 1,4,5,6
C. 1,3,4,5
D. 2,4,5,6 Đáp án là: B. 1,4,5,6 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Tìm phát biểu sai về tia X?
A. Tia X có nhiều ứng dụng trong y học như chiếu, chụp điện
B. Tia X có khả năng làm phát quang nhiều chất
C. Tia X là sóng điện từ có bước sóng nằm trong khoảng 10-11 m đến 10-8m
D. Tia X bị lệch trong điện từ trường Đáp án là: D. Tia X bị lệch trong điện từ trường </s> | [
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<s> Chọn đáp án đúng với câu hỏi: A cooperative program between China and Germany on building Yangzhow, a famous ancient city, into a(n) ________ city has proceeded smoothly since it started in September last year.
A. ecology-friendly
B. friendly ecology
C. friendly-ecological
D. ecological-friendly Đáp án là: A. ecology-friendly </s> | [
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1,
1,
1,
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1,
1,
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1,
1,
1,
1,
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1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Rút gọn biểu thức (a2^√(2)−b2^√(3))/((a^√(2)−b^√(3))^2)+1 (với a>0,b>0và a^√(2)≠b^√(3)) được kết quả
A. 2.
B. 2a^√(2).
C. (a^√(2)+b^√(3))/(a^√(2)−b^√(3)).
D. (2a^√(2))/(a^√(2)−b^√(3)). Đáp án là: D. (2a^√(2))/(a^√(2)−b^√(3)) </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Hiệp định Pari về Việt Nam quy định: các bên tham chiến thực hiện ngừng bắn ở miền Nam Việt Nam vào lúc
A. 24 giờ ngày 21 - 7 - 1973.
B. 24 giờ ngày 27- 1 - 1973.
C. 24 giờ ngày 27- 11 - 1973.
D. 24 giờ ngày 27 - 2 - 1973. Đáp án là: B. 24 giờ ngày 27- 1 - 1973. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: She said,“The train will be leaving soon.”
A. She said that the train would leave soon.
B. She said that the train is leaving.
C. She said that the train would be leaving soon.
D. She said that the train will leave soon. Đáp án là: C. She said that the train would be leaving soon. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Climate scientists now believe that (20) ______ are mainly responsible for this.
A. humans
B. the old
C. adults
D. the young Đáp án là: A. humans </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Câu thơ nào dưới đây chứa đựng chân lí?
A. Cò một mình, cò phải kiếm lấy ăn Con có mẹ con chơi rồi lại ngủ
B. Con ngủ yên thì cò cũng ngủ Cánh của cò hai đứa đắp chung đôi
C. Con dù lớn vẫn là con của mẹ Đi hết đời, lòng mẹ vẫn theo con
D. Cho cả sắc trời Đến hát Quanh nôi Đáp án là: C. Con dù lớn vẫn là con của mẹ Đi hết đời, lòng mẹ vẫn theo con </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Đặc điểm chung trong phát triển công nghiệp của vùng Bắc Trung Bộ và Duyên hải Nam Trung Bộ là
A. nguồn lao động dồi dào, tương đối rẻ
B. đã hình thành được chuỗi các trung tâm công nghiệp ven biển
C. ngành công nghiệp chủ yếu là khai thác khoáng sản
D. hạn chế về tài nguyên nhiên liệu và năng lượng Đáp án là: D. hạn chế về tài nguyên nhiên liệu và năng lượng </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Hiện nay vấn đề mang tính toàn cầu đang trở thành mỗi đe dọa trực tiếp tới ổn định, hòa bình của thế giới là
A. ô nhiễm môi trường.
B. bùng nổ dân số.
C. nạn khủng bố.
D. suy giảm đa dạng sinh học Đáp án là: C. nạn khủng bố. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một con lắc lò xo gồmvật nhỏ và lò xo nhẹ có độ cứng 100 N/m, dao động điều hòa với biên độ 0,1m. Mốc thế năng ở vị trí cân bằng. Khi vật cách vị trí cân bằng 6cm thì động năng của vật là:
A. 0,32 J.
B. 0,64 J.
C. 3,2 mJ.
D. 6,4mJ. Đáp án là: A. 0,32 J. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Ngành khoa học nào dưới đây cung cấp những tri thức cơ bản để nhà sử học khám phá về: quá trình làm ra lịch và cách tính thời gian của con người trong lịch sử?
A. Địa lí tự nhiên.
B. Thiên văn học.
C. Địa chất học.
D. Khảo cổ học. Đáp án là: B. Thiên văn học. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Khoanh vào chữ đặt trước câu trả lời đúng : a) Chữ số 1 trong số 241356 có giá trị :
A. 1
B. 1356
C. 1000
D. 10000 Đáp án là: C. 1000 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Nhận xét nào sau đây là đúng về tác động của phong trào “vô sản hóa" của Hội Việt Nam Cách mạng Thanh niên (từ cuối năm 1928)?
A. Làm phong trào yêu nước chuyển hẳn sang khuynh hướng vô sản.
B. Thúc đẩy phong trào công nhân phát triển mạnh mẽ.
C. Thúc đẩy phong trào đấu tranh theo khuynh hướng tư sản.
D. Làm cho phong trào công nhân hoàn toàn đấu tranh tự giác. Đáp án là: B. Thúc đẩy phong trào công nhân phát triển mạnh mẽ. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: _______ will always important to me.
A. Whatever you do
B. Whatever do you do
C. What do you do
D. You do Đáp án là: A. Whatever you do </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Nguyên nhân quyết định dẫn đến sự thất bại của phái chủ chiến trong cuộc phản công quân Pháp ở Kinh thành Huế (7/1885) là do
A. quân Pháp rất mạnh, có nhiều kinh nghiệm trong chiến tranh xâm lược.
B. công tác chuẩn bị chưa tốt, cuộc phản công diễn ra trong bối cảnh bị động.
C. không nhận được sự ủng hộ của phái chủ hòa trong triều đình Huế.
D. chênh lệch về lực lượng và công tác tuyên truyền chưa tốt. Đáp án là: B. công tác chuẩn bị chưa tốt, cuộc phản công diễn ra trong bối cảnh bị động. </s> | [
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1715,
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29901,
405,
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4099,
31500,
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302,
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31500,
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439,
4099,
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<s> Chọn đáp án đúng với câu hỏi: We are ready _____ the environment.
A. to clean
B. cleaned
C. clean
D. cleaning Đáp án là: A. to clean </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho một hình đa diện. Khẳng định nào sau đây sai?
A. Mỗi cạnh là cạnh chung của ít nhất ba mặt.
B. Mỗi đỉnh là đỉnh chung của ít nhất ba cạnh.
C. Mỗi đỉnh là đỉnh chung của ít nhất ba mặt.
D. Mỗi mặt có ít nhất ba cạnh. Đáp án là: A. Mỗi cạnh là cạnh chung của ít nhất ba mặt. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: ______ people still mistakenly believe that ______ majors are useless and give students no job opportunities.
A. Many – little
B. A lot of – some
C. Almost – many
D. Few – much Đáp án là: B. A lot of – some </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Đốt cháy hoàn toàn một lượng hỗn hợp M gồm ancol X, axit cacboxylic Y và este Z (đều no, đơn chức, mạch hở, Y và Z có cùng số nguyên tử cacbon) cần dùng vừa đủ 12,32 lít khí O 2 (đktc), thu được 11,2 lít khí CO 2 (đktc). Chất Y là
A. HCOOH
B. CH 3 CH 2 COOH
C. CH 3 CH 2 CH 2 COOH
D. CH 3 COOH. Đáp án là: D. CH 3 COOH </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Đâu không phải là sáng tác của Nguyễn Đình Thi?
A. Đất nước
B. Lá đỏ
C. Nhớ
D. Ánh trăng Đáp án là: D. Ánh trăng </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Căn cứ vào Atlat Địa lí Việt Nam trang 22, cho biết ngành chế biến đường, sữa, bánh kẹo có ở trung tâm công nghiệp chế biến lương thực, thực phẩm nào sau đây?
A. Hà Nội.
B. Đà Nẵng.
C. Nha Trang.
D. Cà Mau. Đáp án là: A. Hà Nội. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Đặt một vật AB trước thấu kính hội tụ, cách thấu kính 15cm thì thu được ảnh của vật hiện rõ trên màn đặt sau thấu kính. Dịch chuyển vật một đoạn 3cm lại gần thấu kính thì lúc này ta phải dịch chuyển màn ra xa thấu kính để thu được ảnh rõ nét. Ảnh sau cao gấp 2 lần ảnh trước. Xác định tiêu cự của thấu kính.
A. 18cm
B. 20cm
C. 9cm
D. 10cm Đáp án là: C. 9cm </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cách sử dụng nào dưới đây là tiết kiệm điện năng?
A. Sử dụng đèn công suất là 100W
B. Sử dụng thiết bị điện khi cần thiết
C. Cho quạt chạy khi mọi người đi khỏi nhà
D. Bật sáng tất cả các đèn trong nhà suốt đêm Đáp án là: B. Sử dụng thiết bị điện khi cần thiết </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho mạch điện như hình vẽ, trong đó R 1 = 4 Ω, R 2 = 5 Ω, R 3 = 20 Ω Nếu dòng điện đi qua R 1 có cường độ bằng 5 A thì hiệu điện thế giữa hai đầu A, B của mạch điện bằng
A. 40 V
B. 145 V.
C. 17 V
D. 10 V Đáp án là: A. 40 V </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Ngành nào sau đây không thuộc nhóm ngành công nghiệp chế biến?
A. Luyện kim.
B. Cơ khí.
C. Sản xuất hàng tiêu dùng.
D. Khai thác mỏ. Đáp án là: D. Khai thác mỏ </s> | [
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<s> Chọn đáp án đúng với câu hỏi: The last time I saw Rose was three years ago.
A. I haven’t seen Rose since three years.
B. I haven’t seen Rose three years ago.
C. I didn’t see Rose for three years.
D. I haven’t seen Rose for three years. Đáp án là: D. I haven’t seen Rose for three years </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Parabol (P): y = x^2 + 4x + 4 có số điểm chung với trục hoành là:
A. 0.
B. 1.
C. 2.
D. 3. Đáp án là: B. 1. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Apart from those three very cold weeks in January, it has been a very ______ winner.
A. plain
B. pale
C. mild
D. calm Đáp án là: A. plain </s> | [
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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: Học thuyết nào đã chi phối việc đế quốc Mĩ quyết tâm theo đuổi cuộc chiến tranh Việt Nam (1954-1975) để ngăn chặn làn sóng cộng sản tràn xuống phía Nam?
A. Học thuyết Truman
B. Học thuyết Domino
C. Học thuyết Kenedy
D. Học thuyết Nixon Đáp án là: B. Học thuyết Domino </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: All of the following are true EXCEPT............
A. Signal, symbols, signs and gestures are found in every culture.
B. Signal, symbols, signs and gestures are very useful.
C. Signal, symbols, signs and gestures also have some disadvantage.
D. Signal, symbols, signs and gestures are only used for long distance contact. Đáp án là: D. Signal, symbols, signs and gestures are only used for long distance contact </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Hệ thần kinh dạng ống hoạt động theo nguyên tắc nào?
A. Phản xạ có điều kiện
B. Phản xạ không điều kiện
C. Phản xạ
D. Không theo nguyên tắc nào Đáp án là: C. Phản xạ </s> | [
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<s> Chọn đáp án đúng với câu hỏi: I think you should spend more time improving your pronunciation.
A. If I were you, I would spend more time improving my pronunciation.
B. If I am you, I would spend more time improving my pronunciation.
C. If I am you, I will spend more time improving my pronunciation.
D. If I were you, I will spend more time improving my pronunciation. Đáp án là: A. If I were you, I would spend more time improving my pronunciation. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Phát biểu nào sau đây là đúng?
A. Ancol isoamylic có công thức cấu tạo là CH 3 CH 2 CH(CH 3 )CH 2 OH
B. HOOC-[CH 2 ] 2 –CH(NH 2 )–COOH có tên gọi là axit α-aminoglutamic
C. CH 3 CH 2 CHClCH 2 CH 3 có tên gọi là sec-pentyl clorua
D. CH 2 =CH-CH 2 OH có tên gọi là ancol anlylic Đáp án là: D. CH 2 =CH-CH 2 OH có tên gọi là ancol anlylic </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Trong thí nghiệm Young về giao thoa ánh sáng được thực hiện trong không khí, 2 khe S 1 và S 2 được chiếu bằng ánh sáng đơn sắc có bước sóng λ. Khoảng vân đo được là 1,2mm. Nếu thí nghiệm được thực hiện trong một chất lỏng thì khoảng vân là 1 mm. Chiết suất của chất lỏng là:
A. 1,33
B. 1,2
C. 1,5
D. 1,7 Đáp án là: B. 1,2 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Trong cơ thể người, cơ quan nào dưới đây không tham gia vào hoạt động bài tiết?
A. Ruột
B. Thận
C. Phổi
D. Da Đáp án là: A. Ruột </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho các phản ứng sau: (1) N 2 + O 2 → 3000 ° 2NO (2) N 2 + 3H 2 ⇌ 2NH 3 Trong hai phản ứng trên thì nitơ
A. chỉ thể hiện tính khử.
B. thể hiện tính khử và tính oxi hóa.
C. chỉ thể hiện tính oxi hóa.
D. không thể hiện tính khử và tính oxi hóa. Đáp án là: B. thể hiện tính khử và tính oxi hóa. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Sau khi ngắt tụ điện phẳng khỏi nguồn điện, ta tịnh tiến hai bản để khoảng cách giữa chúng giảm đi hai lần, khi đó năng lượng điện trường trong tụ sẽ là
A. Tăng lên bốn lần
B. Không đổi
C. Giảm đi hai lần
D. Tăng lên hai lần Đáp án là: C. Giảm đi hai lần </s> | [
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<s> Chọn đáp án đúng với câu hỏi: The writer doesn't like hard work. It's_______ to look after a garden.
A. a hard work
B. a hard job
C. hard job
D. hardly a job Đáp án là: B. a hard job </s> | [
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<s> Chọn đáp án đúng với câu hỏi: 168 : 0,1 = _..... Số thích hợp điền vào chỗ trống là :
A. 1680
B. 16,8
C. 1,68
D. 0,168 Đáp án là: C. 1,68 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Có hai điện tích điểm q 1 và q 2, chúng hút nhau. Khẳng định nào sau đây là đúng?
A. q 1 > 0 và q 2 > 0.
B. q 1 < 0 và q 2 < 0.
C. q 1.q 2 > 0.
D. q 1.q 2 < 0. Đáp án là: D. q 1 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Trong ống phóng tia X ở Bài 18.4, một electron có điện tích e = − 1, 6.10 − 19 C bật ra khỏi bản cực âm (catôt) bay vào điện trường giữa hai bản cực. Lực điện tác dụng lên electron đó bằng
A. 8 ⋅ 10 − 13 N
B. 8 ⋅ 10 − 18 N
C. 3, 2 ⋅ 10 − 17 N
D. 8 ⋅ 10 − 15 N Đáp án là: A. 8 ⋅ 10 − 13 N </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Biên bản gồm mấy phần?
A. 3 phần
B. 4 phần
C. 5 phần
D. 6 phần Đáp án là: A. 3 phần </s> | [
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2... | [
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<s> Chọn đáp án đúng với câu hỏi: Theo em, quan niệm về văn chương sau đây có thể bổ xung cho quan niệm của Hoài Thanh để có một quan niệm đầy đủ về nguồn gốc của văn chương?
A. Văn chương bắt nguồn từ cuộc sống lao động của con người.
B. Văn chương bắt nguồn từ thế giới thần bí bên ngoài con người.
C. Văn chương bắt nguồn từ việc muốn biết trước tương lai của con người.
D. Văn chương bắt nguồn từ việc muốn tìm hiểu quá khứ của con người. Đáp án là: A. Văn chương bắt nguồn từ cuộc sống lao động của con người. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Chính sách kinh tế mới được thực hiện trong hoàn cảnh nào?
A. Chính sách Cộng sản thời chiến không còn phù hợp.
B. Tình hình chính trị tương đối ổn định, uy tín của Đảng Bônsêvích được củng cố.
C. Nhân dân phấn khởi chào đón hòa bình, khối đại đoàn kết được tăng cường.
D. Liên minh 14 nước đế quốc đang can thiệp vũ trang vào nước Nga. Đáp án là: A. Chính sách Cộng sản thời chiến không còn phù hợp. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một mảnh đất hình chữ nhật có chiều dài 120m, chiều rộng 36m, người ta muốn trồng cây xung quanh vườn sao cho mỗi góc vườn có 1 cây và khoảng cách giữa hai cây liên tiếp bằng nhau. Hỏi số cây phải trồng ít nhất là bao nhiêu cây?
A. 26;
B. 52;
C. 78;
D. 104. Đáp án là: A. 26; </s> | [
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<s> Chọn đáp án đúng với câu hỏi: All the houses in the area________immediately.
A. has to rebuilt
B. had to rebuild
C. have to be rebuilt
D. have to rebuild Đáp án là: C. have to be rebuilt </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Đại lượng nào sau đây đặc trưng cho tính chất đổi chiều nhanh hay chậm của một dao động điều hòa?
A. Biên độ
B. Gia tốc
C. Vận tốc
D. Tần số Đáp án là: D. Tần số </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho một oxit của kim loại M vào bình chứa dung dịch H 2 SO 4 loãng dư, sau khi kết thúc phản ứng, thêm tiếp dung dịch NaOH dư vào bình, thu được dung dịch có màu vàng. Oxit của kim loại M là
A. CrO 3.
B. Cr 2 O 3.
C. Al 2 O 3.
D. CuO. Đáp án là: A. CrO 3. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: The word “descent” in paragraph 3 is closest in meaning to _______.
A. fall
B. gradient
C. pedigree
D. assault Đáp án là: A. fall </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho mạch điện như hình vẽ, nguồn điện có E=6V và điện trở trong không đáng kể. Biết R 1 = R 2 = 30 Ω, R 3 = 7, 5 Ω. Tính cường độ dòng điện chạy qua điện trở R 2
A. 0,2A
B. 2A
C. 0,8A
D. 0,4A Đáp án là: A. 0,2A </s> | [
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<s> Chọn đáp án đúng với câu hỏi: X là este của một ancol đơn chức với một axit cacboxylic hai chức, Y là axit cacboxylic đơn chức. cho hỗn hợp A gồm X và Y tác dụng vừa đủ với dung dịch KOH, sau phản ứng kết thúc thu được ancol Z và 86,2 gam hỗn hợp muối T. Cho toàn bộ hơi ancol Z thu được đi qua ống đựng lượng dư CuO nung nóng được hỗn hợp hơi B gồm anđehit và hơi nước. Dẫn lượng anđehit trong B qua bình đựng lượng dư dung dịch AgNO 3 /NH 3 được 259,2 Ag. Mặt khác, nung 86,2 gam muối T với NaOH dư/CaO được 12,32 lít (đktc) một ankan duy nhất. Biết các phản ứng xảy ra hoàn toàn. Phần trăm khối lượng của X trong hỗn hợp A ban đầu là
A. 70,30%.
B. 29,70%.
C. 50,4%.
D. 26,92%. Đáp án là: A. 70,30%. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Althought she seems intelligent, she’s not to be relied on.
A. She’s too intelligent to be relied on.
B. However she seems intelligent, she’s not to be relied on.
C. She may be intelligent, but she’s not to be relied on.
D. However intelligent she seems, she’s not to be relied on Đáp án là: C. She may be intelligent, but she’s not to be relied on. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Tổng số đo chiều dài của ba tấm vải là 224m. Nếu cắt 3/7 tấm vải thứ nhất, 1/5 tấm vải thứ hai và 2/5 tấm vải thứ ba thì phần còn lại của ba tấm vải bằng nhau. Tính chiều dài tấm vải thứ nhất.
A. 90m
B. 224m
C. 84m
D. 112m Đáp án là: C. 84m </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Căn cứ vào Atlat Địa lí Việt Nam trang 28, hãy cho biết các tuyến đường nào theo hướng Bắc – Nam chạy qua vùng Duyên hải Nam Trung Bộ?
A. Quốc lộ 1A và đường 14.
B. Quốc lộ 1A và quốc lộ 9.
C. Quốc lộ 1A và đường sắt Bắc – Nam.
D. Đường sắt Bắc – Nam và đường Hồ Chí Minh. Đáp án là: C. Quốc lộ 1A và đường sắt Bắc – Nam. </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,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Một ankan A có 12 nguyên tử hiddro trong phân tử, khi A tác dụng với clo có chiếu sáng chỉ thu được một dẫn xuất monoclo. Tên của A là:
A. Isobutan
B. Isopentan
C. Neohexan
D. Neopentan Đáp án là: D. Neopentan </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,
4546,
31214,
31500,
29873,
385,
11052,
319,
1302,
30103,
29871,
29896... | [
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Một hộp đựng 5 viên bi đỏ, 4 viên bi xanh. Lấy ngẫu nhiên 3 viên bi từ hộp đó. Xác suất lấy được ít nhất 1 viên đỏ bằng
A. 37/42
B. 1/21
C. 5/42
D. 20/21 Đáp án là: D. 20/21 </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,
341,
30902,
29873,
298,
30902,
29886,
29871,
30128,
31874,
865,
29871... | [
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: The national debt in the near future.
A. will pay off
B. will be paid off
C. will pay
D. will be paid Đáp án là: B. will be paid off </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,
450,
4797,
2553,
29873,
297,
278,
2978,
5434,
29889,
13,
29909,
298... | [
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Axit nào sau đây dễ bay hơi.
A. H 2 S O 3
B. H 2 S O 4
C. H C l
D. H N O 3 Đáp án là: A. H 2 S O 3 </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,
22523,
277,
1055,
30712,
29877,
12507,
29871,
30128,
29874,
31500,
29... | [
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Chính sách nào thể hiện “chiến lược chiến tranh một phía” của Mĩ – Diệm?
A. Gạt hết quân Pháp để Mĩ độc chiến miền Nam
B. Phế truất Bảo Đại, đưa Diệm lên làm Tổng thống
C. Hiệp thương tuyển cử riêng lẻ
D. Ra sức “tố cộng”, “diệt cộng” thi hành Luật 10 – 59 Đáp án là: D. Ra sức “tố cộng”, “diệt cộng” thi hành Luật 10 – 59 </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,
18168,
30103,
29876,
29882,
872,
30103,
305,
1055,
30712,
29877,
278,... | [
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Choose a, b, c, or d that best completes the sentence or that can substitute the underlined part. After he had gone to Japan, he went to Korea.
A. Going to Japan
B. After Japan
C. To have gone to Japan
D. To go to Japan Đáp án là: B. After Japan </s> | [
1,
1,
29871,
678,
30975,
29876,
29871,
30128,
29976,
29886,
29871,
1715,
29871,
30128,
30030,
865,
325,
31280,
29875,
274,
30057,
29884,
298,
228,
190,
146,
29875,
29901,
14542,
852,
263,
29892,
289,
29892,
274,
29892,
470,
270,
393,
1900... | [
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Căn cứ vào Atlat Địa lí Việt Nam trang 27, cho biết các tỉnh nào sau đây ở Bắc Trung Bộ nuôi nhiều trâu?
A. Thanh Hóa, Nghệ An, Hà Tĩnh.
B. Nghệ An, Hà Tĩnh, Quảng Bình.
C. Hà Tĩnh, Quảng Bình, Quảng Trị.
D. Quảng Bình, Quảng Trị, Thừa Thiên Huế. Đáp án là: A. Thanh Hóa, Nghệ An, Hà Tĩnh. </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,
9243,
207,
137,
29876,
2723,
207,
158,
30103,
2947,
30712,
29877,
2... | [
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Kí hiệu nguyên tử biểu thị đầy đủ đặc trưng cho một nguyên tử của một nguyên tố hoá học vì nó cho biết
A. số khối A
B. số hiệu nguyên tử Z
C. nguyên tử khối của nguyên tử
D. số khối A và số hiệu nguyên tử Z Đáp án là: D. số khối A và số hiệu nguyên tử Z </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,
16540,
30103,
298,
347,
31214,
31500,
29884,
302,
2543,
4099,
31500,
... | [
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Tính chất nào sau đây không thuộc Axit photphoric?
A. Axit photphoric và Axit trung bình, phân li theo 3 nấc.
B. Không thể nhận biết H 3 PO 4 bằng dung dịch AgNO 3.
C. Axit photphoric tan trong nước theo bất kì tỉ lệ nào.
D. Ở điều kiện thường Axit photphoric là chất lỏng, trong suốt, không màu. Đáp án là: D. Ở điều kiện thường Axit photphoric là chất lỏng, trong suốt, không màu </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,
30103,
29876,
29882,
10329,
31500,
30103,
29873,
1055,
30712,
... | [
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
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