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<s> Chọn đáp án đúng với câu hỏi: Located about 60 km southwest of Seoul, this eco city has been planned around a central park and designed so that every resident can walk to work in the business _ __ ___.
A. district
B. area
C. location
D. organisation Đáp án là: A. district </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Trong phân tử của cacbonhiđrat luôn có
A. nhóm chức axit.
B. nhóm chức xeton.
C. nhóm chức ancol.
D. nhóm chức anđehit. Đáp án là: C. nhóm chức ancol. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Trong các mệnh đều sau, mệnh đề nào đúng?
“ Số các đỉnh hoặc các mặt của bất kì hình đa diện nào cũng...”
A. lớn hơn hoặc bằng 4
B. lớn hơn 4
C. lớn hơn hoặc bằng 5
D. lớn hơn 5 Đáp án là: A. lớn hơn hoặc bằng 4 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Nội dung nào không nằm trong nghị quyết Hội nghị Trung ương Đảng tháng 11/1939?
A. Tạm gác nhiệm vụ cách mạng ruộng đất.
B. Dùng bạo lực cách mạng để giành chính quyền.
C. Đưa vấn đề giải phóng dân tộc lên hàng đầu.
D. Xác định pha... | [
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<s> Chọn đáp án đúng với câu hỏi: Phát biểu nào sau đây là sai?
A. Độ dài của vectơ là khoảng cách giữa điểm đầu và điểm cuối của vectơ đó.
B. Vectơ là đoạn thẳng có hướng.
C. Hai vectơ cùng hướng thì cùng phương.
D. Hai vectơ cùng phương thì cùng hướng. Đáp án là: D. Hai vectơ cùng phương thì cùng hướng </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Gió Tây ôn đới thổi từ áp cao
A. chí tuyến về ôn đới.
B. cực về ôn đới.
C. chí tuyến về xích đạo.
D. cực về xích đạo. Đáp án là: A. chí tuyến về ôn đới. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: The word “ futility ” could be best replaced by _____.
A. uselessness
B. expense
C. importance
D. advantage Đáp án là: A. uselessness </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Choose the best answer. ________ she knows that watching too much TV is a bad habit, she watches less TV than she did before.
A. Or
B. So
C. Because
D. Although Đáp án là: C. Because </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Trong thí nghiệm lai các cây thuộc hai dòng thuần chủng đều có hoa trắng với nhau, kết quả thu được F 1 toàn cây hoa đỏ. Cho các cây F 1 tự thụ phấn thu được F 2 với tỉ lệ kiểu hình 9 cây hoa đỏ : 7 cây hoa trắng. Sự di truyền màu ... | [
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<s> Chọn đáp án đúng với câu hỏi: Cho các nhận định sau: (1) Axit béo là các axit monocacboxylic có mạch cacbon dài không phân nhánh và có chẵn nguyên tử cacbon (12C-24C). (2) Chất béo là trieste của glixerol với các axit béo. (3) Lipit gồm nhiều loại: chất béo, sáp, steroit, photp... | [
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<s> Chọn đáp án đúng với câu hỏi: Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 40 to 44. Nowadays there are many good reasons for using bicycles _(40)_____ cars to travel in city centres. First of... | [
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<s> Chọn đáp án đúng với câu hỏi: Fructozơ và Glucozơ không có đặc điểm?
A. đều tạo phức xanh lam với Cu(OH) 2 ở nhiệt độ thường
B. Trong dung dịch chúng đều tồn tại ở dạng mạch vòng 6 cạnh.
C. Đều là hai dạng thù hình của cùng một chất
D. Phân biệt Fructozơ và Glu... | [
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<s> Chọn đáp án đúng với câu hỏi: I found my new contact lenses strangely at first, but I got used to them in the end.
A. my new
B. strangely
C. got used to
D. in the end Đáp án là: B. strangely </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Can you hear the wind? It’s blowing a ________!
A. drizzle
B. gale
C. breeze
D. gust Đáp án là: B. gale </s> | [
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1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Tìm hệ số tự do của hiệu f(x) - 2.g(x) vớif(x) = 5x^4 + 4x^3 - 3x^2 + 2x - 1; g(x) = -x^4 + 2x^3 - 3x^2 + 4x + 5
A. 7
B. 11
C. -11
D. 4 Đáp án là: C. -11 </s> | [
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323,
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269,
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260,
31874,
437,
274,
31... | [
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<s> Chọn đáp án đúng với câu hỏi: I _________ smoking should be banned, especially in restaurants.
A. think
B. have
C. obtain
D. get Đáp án là: A. think </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho 2,7 gam Al tác dụng với 150 ml dung dịch X chứa Fe(NO 3 ) 3 0,5 M và Cu(NO 3 ) 2 0,5 M. Sau khi kết thúc phản ứng thu được m gam chất rắn. Giá trị của m là
A. 6,9 gam
B. 9,0 gam
C. 13,8 gam
D. 18,0 gam Đáp án là: A. 6,9 gam </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Mark the letter A, B, C, or D to indicate the correct response to the following exchange “Hello, I’m Minh, the leader of Dream Sky volunteer team.” - “____”
A. Nice to meet you. I’m John, from Volunteer Bolivia.
B. It's nice of you so say so, I'm John, from Volunteer Bolivia.
C. Fine, ... | [
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304,... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Nét nổi bật nhất của truyền thống yêu nước Việt Nam thời phong kiến là
A. xây dựng, phát triển nền kinh tế tự chủ
B. phát triển nền văn minh Đại Việt
C. chống giặc ngoại xâm, giành hoặc bảo vệ nền độc lập dân tộc
D. giư... | [
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1,
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1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Theo dõi quá trình tính trạng chiều cao thân, màu sắc hoa và hình dạng lá ở 1 loài thực vật người ta nhận thấy mỗi cặp gen quy định một cặp tính trạng, alen trội là trội hoàn toàn. Gen quy định chiều cao thân và màu sắc hoa nằm t... | [
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450,
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1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Tìm hai số nguyên liên tiếp, biết rằng 2 lần số nhỏ cộng 3 lần số lớn bằng - 87.
A. Số nhỏ là -18 và số lớn là -17
B. Số nhỏ là -17 và số lớn là -18
C. Số nhỏ là -19 và số lớn -20
D. Số nhỏ là -17 số lớn là -16 Đáp án là: A. Số nhỏ là -18 và số lớn là -17 </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Cuộc khởi nghĩa Hai Bà Trưng bùng nổ tại
A. Mê Linh (Vĩnh Phúc)
B. Cổ Loa (Đông Anh – Hà Nội)
C. Hát Môn (Phúc Thọ - Hà Nội)
D. Luy Lâu (Thuận Thành – Bắc Ninh) Đáp án là: C. Hát Môn (Phúc Thọ - Hà Nội) </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Hội nghị nào đã đặt nền tảng cho sự ra đời của tổ chức Liên hợp quốc
A. Hội nghị Ianta
B. Hội nghị Xan Phranxico
C. Hội nghị Pốtxđam
D. Hội nghị Pari Đáp án là: A. Hội nghị Ianta </s> | [
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1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Ý nào không phản ánh đúng những thách thức khi Việt Nam gia nhập ASEAN?
A. Nền kinh tế có nhiều chuyển biến, vị trí quốc tế thay đổi.
B. Nền kinh tế bị cạnh tranh, bản sắc văn hóa có nguy cơ xói mòn.
C. Kẻ thù thực hiện âm mưu “D... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Nước có ngành giao thông vận tải biển hiện đứng hàng thứ ba thế giới là
A. Hoa Kì
B. LBNga
C. Ô-xtrây-li-a
D. Nhật Bản Đáp án là: D. Nhật Bản </s> | [
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3... | [
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<s> Chọn đáp án đúng với câu hỏi: Cho A = x^5y^n – 12xn+^1y^4; B = 24xn-^1y^3. Tìm số tự nhiên n > 0 để A ⁝ B
A. n Є {3;4;5;6}
B. n Є {4;5;6}
C. n Є {1;2;3;4;5;6}
D. n Є {4;5} Đáp án là: A. n Є {3;4;5;6} </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Find the word which has a different sound in the part underlined.
A. swallow ed
B. practic ed
C. finish ed
D. punch ed Đáp án là: A. swallow ed </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Who is more influenced by colors you wear?
A. You are more influenced
B. Your family
C. The people around you are more influenced
D. Anymore Đáp án là: A. You are more influenced </s> | [
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1,
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<s> Chọn đáp án đúng với câu hỏi: Nội dung chính của đoạn sau: Gió đưa cành trúc la đà, Tiếng chuông Trấn Võ canh gà Thọ Xương. Mịt mờ khói tỏa ngàn sương, Nhịp chày Yên Thái, mặt gương Tây Hồ.
A. Bức tranh buổi sáng kinh thành Thăng Long
B. Vẻ đẹp của Tháp Mười
C. B... | [
1,
1,
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1939,
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270,
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2723... | [
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1,
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1,
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1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: What is the main idea of the passage?
A. A good adventure movie.
B. Research into the ocean.
C. A review on a documentary film.
D. How marine species are being killed. Đáp án là: C. A review on a documentary film. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Một con ngựa kéo xe đi được 120 m với lực kéo là 200 N trong thời gian 60 giây. Công suất của con ngựa là:
A. 4 W.
B. 40 W.
C. 400 W.
D. 4000 W. Đáp án là: C. 400 W. </s> | [
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1,
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1,
1,
1,
1,
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1... |
<s> Chọn đáp án đúng với câu hỏi: Chương trình Sinh học ở cấp Trung học cơ sở không tìm hiểu về vấn đề lớn nào sau đây?
A. Thực vật
B. Di truyền và biến dị
C. Địa lý sinh vật
D. Cơ thể người và vệ sinh Đáp án là: C. Địa lý sinh vật </s> | [
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1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Tế Hanh nhận giải thưởng Hồ Chí Minh về văn học nghệ thuật năm bao nhiêu?
A. 1995
B. 1996
C. 1997
D. 1998 Đáp án là: B. 1996 </s> | [
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1920,
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302,
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31500,
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330,... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Vùng nào sau đây là vùng đứng đầu cả nước về diện tích lúa:
A. Đồng bằng sông Cửu Long
B. Đông Nam Bộ
C. Đồng bằng sông Hồng
D. Trung du miền núi phía Bắc Đáp án là: A. Đồng bằng sông Cửu Long </s> | [
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1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Khoảng vài chục mét ở phía trên bề mặt đất là có thực vật sinh sống, do có
A. ánh sáng, khí, nước, chất dinh dưỡng.
B. ánh sáng, khí, nguồn nước, nhiệt độ.
C. chất dinh dưỡng, không khí và nước.
D. chất dinh dưỡng, nước v... | [
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476,
1251,
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207,
140,
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29875,
521,
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31... | [
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1,
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1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Một tổ có 4 học sinh nam và 5 học sinh nữ. Hỏi có bao nhiêu cách xếp học sinh trong tổ thành hàng dọc sao cho học sinh nam và nữ đứng xen kẽ nhau?
A. 4!. 5!
B. 4!+5!
C. 9!
D. A94.A95 Đáp án là: A. 4!. 5! </s> | [
1,
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1,
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1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Ý nghĩa quan trọng nhất của phong trào “Đồng khởi” là gì?
A. Giáng một đòn nặng nề vào chính sách thực dân mới của Mĩ ở miền Nam
B. Làm lung lay tận gốc chính quyền tay sai Ngô Đình Diệm
C. Đánh dấu bước phát triển nhảy vọt của... | [
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865,
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1,
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1,
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1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Các mối quan hệ trong sản xuất, giao tiếp, phân phối là biểu hiện của
A. Môi trường nhân tạo
B. Môi trường xã hội
C. Môi trường sống
D. Môi trường địa lý Đáp án là: B. Môi trường xã hội </s> | [
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540,
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1,
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1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Khi làm thí nghiệm với HNO 3 đặc, nóng thường sinh ra khí NO 2. Để hạn chế tốt nhất khí NO 2 thoát ra gây ô nhiễm môi trường, người ta nút ống nghiệm bằng bông tẩm dung dịch nào sau đây?
A. Muối ăn.
B. Cồn.
C. Giấm ăn.
D. Xút. Đá... | [
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1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: At 4 o’clock Mr. Hutchinson still had some ____________ to do in the garden.
A. works
B. jobs
C. effort
D. task Đáp án là: B. jobs </s> | [
1,
1,
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2180,
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288,
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13058,
3237,
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<s> Chọn đáp án đúng với câu hỏi: Chọn câu đúng nhất:
A. Kim loại là chất dẫn điện
B. Kim loại được cấu tạo từ các nguyên tử
C. Trong kim loại luôn tồn tại các điện tử tự do
D. Cả ba câu trên đều đúng Đáp án là: D. Cả ba câu trên đều đúng </s> | [
1,
1,
29871,
678,
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1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Một dây dẫn có điện trở là 5 Ω được cắt thành ba đoạn theo tỉ lệ 2 : 3 : 5. Điện trở mỗi dây sau khi cắt lần lượt là:
A. 1,0 Ω ; 1,25 Ω ; 2,75 Ω.
B. 0,75 Ω ; 1 Ω ; 3,25 Ω.
C. 1 Ω ; 1,5 Ω ; 2,5 Ω.
D. 0,75 Ω ; 1,25 Ω ; 3 Ω. Đáp án là: C. 1 Ω ; 1,5 Ω ; ... | [
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<s> Chọn đáp án đúng với câu hỏi: Chính phủ Việt Nam Dân chủ Cộng hòa đã tiến hành biện pháp gì để giải quyết vấn đề ruộng đất cho nông dân sau khi giành thắng lợi?
A. Tịch thu ruộng đất của địa chủ chia cho người không có ruộng.
B. Lấy ruộng đất của đế quố... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Có hai đường dây tải điện đi cùng một công suất điện với dây dẫn cùng tiết diện, làm cùng một chất. Đường dây thứ nhất có chiều dài 100km và hiệu điện thế ở hai đầu dây là 100000kV, đường dây thứ hai có chiều dài 200km ... | [
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... | [
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1,
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1... |
<s> Chọn đáp án đúng với câu hỏi: Số hiệu nguyên tử của nguyên tố có tổng số electron trên các phân lớp p bằng 11 là:
A. 13
B. 15
C. 19
D. 17 Đáp án là: D. 17 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho số phức z thỏa mãn (z−4)+(z+4)=10.Giá trị lớn nhất và giá trị nhỏ nhất của (z) lần lượt là
A. 10 và 4
B. 4 và 5
C. 4 và 3.
D. 5 và 3. Đáp án là: D. 5 và 3 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: I'd have told you if I _________________ the book.
A. had seen
B. should have seen
C. saw
D. would have seen Đáp án là: A. had seen </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Nhận định nào sau đây không đúng về điều kiện tự nhiên Nhật Bản?
A. Chiếm phần lớn diện tích là núi trung bình, thấp
B. Khí hậu có sự thay đổi từ Bắc xuống Nam
C. Đồng bằng ven biển có diện tích rộng, phù sa màu mỡ
D. Có n... | [
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<s> Chọn đáp án đúng với câu hỏi: Điện phân dung dịch chứa m gam hỗn hợp gồm CuSO 4 và KCl bằng điện cực trơ, màng ngăn xốp với cường độ dòng điện không đổi I = 5A, sau thời gian t giây, thấy khối lượng catot tăng 5,12 gam. Nếu tiếp tục điện phân thêm 2t giây nu... | [
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<s> Chọn đáp án đúng với câu hỏi: Trong dao động điều hòa của một vật, vận tốc biến thiên điều hòa
A. ngược pha so với li độ.
B. ngược pha với gia tốc.
C. cùng pha so với gia tốc
D. lệch pha 0,5π so với li độ. Đáp án là: D. lệch pha 0,5π so với li độ </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Mẫu số chung nhỏ nhất của các phân số: 3/5;3/8;3/10;3/20 là:
A. 80
B. 60
C. 40
D. 20 Đáp án là: C. 40 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Dịch mạch rây được vận chuyển từ lá xuống rễ là nhờ?
A. Quá trình cung cấp năng lượng của hô hấp
B. Sự chênh lệch áp suât thâm thấu giữa cơ quan cho và cơ quan nhận
C. Lực hút của thoát hơi nước và lực đấy của rễ
D. Lự... | [
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<s> Chọn đáp án đúng với câu hỏi: Để trung hoà 200ml H 2 SO 4 0,1M cần dùng V (ml) dung dịch Ba(OH) 2 0,2M. Giá trị của V là:
A. 400 ml
B. 350 ml
C. 300 ml
D. 100 ml Đáp án là: D. 100 ml </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Hãy sắp xếp các vương triều trên theo đúng thứ tự thời gian.
A. Vương triều Hồi giáo Đê-li ⇒ Vương triều Mô-gôn ⇒ Vương triều Gup-ta.
B. Vương triều Gup-ta ⇒ Vương triều Hồi giáo Đê-li ⇒ Vương triều Mô-gôn.
C. Vương triều Hồi ... | [
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<s> Chọn đáp án đúng với câu hỏi: Hỗn hợp X gồm hai chất hữu cơ no, mạch hở (đều chứa C, H, O), trong phân tử mỗi chất có hai nhóm chức trong số các nhóm -OH, -CHO, -COOH. Cho m gam X phản ứng hoàn toàn với lượng dư dung dịch AgNO 3 trong NH 3, thu được 4,05 gam Ag và 1,... | [
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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... |
<s> Chọn đáp án đúng với câu hỏi: (36) _______ the job, let the interviewer know that
A. with
B. in
C. on
D. for Đáp án là: B. in </s> | [
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313,
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903,
7652,
1649,
278,
4982,
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1235,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Một bếp điện tiêu thụ một điện năng 480 kJ trong 24 phút. Hiệu điện thế đặt vào bếp bằng 220 V. Khi bếp hoạt động, điện năng chủ yếu đã chuyển hóa thành dạng năng lượng nào?
A. Nhiệt năng.
B. Hóa năng.
C. Cơ năng.
D. Năng lượn... | [
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1,
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865,
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274,
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29901,
4546,
31214,
31500,
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367,
31500,
30103,
29886,
29871,
30128,
34... | [
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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: Trên vòng đo độ ở La bàn hướng Tây chỉ
A. 90 0.
B. 270 0.
C. 180 0.
D. 360 0. Đáp án là: B. 270 0. </s> | [
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3012... | [
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1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Có 5 túi gạo nếp và 7 túi gạo tẻ. Mỗi túi gạo nếp có 2 kg, mỗi túi gạo tẻ có 3 kg. Vậy số gạo tẻ nhiều hơn số gạo nếp là........... kg. Số cần điền vào chỗ chấm là:
A. 41
B. 52
C. 71
D. 11
A. 41
B. 52
C. 71
D. 11 Đáp án là: D. 11A </s> | [
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1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Tổng tất cả các giá trị thực của tham số m để hàm số y = 3x^3 + 2(m + 1)x^2 – 3mx + m – 5 có hai điểm cực trị x_1, x_2 đồng thời y(x_1).y(x_2) = 0 là
A. −8;
B. \(3\sqrt {11} - 13\);
C. −39;
D. −21. Đáp án là: D. −21 </s> | [
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25968,... | [
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Cho 22,08 gam hỗn hợp X gồm Mg và Fe vào 150 ml dung dịch chứa AgNO 3 x mol/l và Cu(NO 3 ) 2 2x mol/lít, khi phản ứng kết thúc thu được chất rắn Y và dung dịch Z. Hòa tan hoàn toàn Y bằng dung dịch H 2 SO 4 đặc nóng (dư), thu được 15,12 lít SO ... | [
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Trong số các loại tơ sau: tơ tằm, tơ visco, tơ axetat, tơ capron, tơ enang, tơ nilon – 6,6. Những tơ thuộc loại polime nhân tạo là:
A. tơ tằm và tơ enang
B. tơ nilon – 6,6 và tơ capron
C. tơ visco và tơ axetat
D. tơ visco và tơ nilon – 6,6 Đáp án là:... | [
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31214,
... | [
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: (Câu 37 đề thi THPT QG năm 2018 – Mã đề M206) Đặt điện áp u A B = 40 cos ( 100 πt + π 6 ) (V) vào hai đầu đoạn mạch AB như hình bên, trong đó tụ điện có điện dung C thay đổi được. Khi C = C 0 thì tổng trở của đoạn mạch AB đạt giá trị cực tie... | [
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3... | [
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Trong mặt phẳng Oxy cho \(\overrightarrow a \left( {1;3} \right)\) và \(\overrightarrow b \left( { - 2;1} \right)\). Tích vô hướng \(\overrightarrow a.\overrightarrow b \) là:
A. –1
B. 2
C. 1
D. 4. Đáp án là: C. 1 </s> | [
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1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Thủy phân hoàn toàn 1 mol pentapeptit X thì thu được 3 mol glyxin ; 1 mol alanin và 1 mol valin. Khi thủy phân không hoàn toàn X thì trong hỗn hợp sản phẩm thấy có các đipeptit Ala-Gly; Gly- Ala và tripeptit Gly-Gly-Val. Aminoaxit đầu N, aminoaxit đầu C o... | [
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498,
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5089,
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... | [
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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: Điều kiện hóa đáp ứng là
A. hình thành mối liên hệ mới trong thần kinh trung ương dưới tác động của các kích thích đồng thời.
B. hình thành mối liên hệ mới trong thần kinh trung ương dưới tác động của các kích thích liên tiế... | [
1,
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1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Read the passage carefully, then choose the correct answers. Each summer, the Winant and Clayton Volunteer program sends a group of Americans to volunteer in London for seven weeks and provides housing and a small stipend to help defray the high cost of living. After seven weeks of vol... | [
1,
1,
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865,
325,
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274,
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298,
228,
190,
146,
29875,
29901,
7523,
278,
13382,
16112,
29892,
769,
6755,
278,
1959,
6089,
29889,
... | [
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1,
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1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Đọc văn bản sau: 1. Nguyên liệu (đủ cho hai bát) - Rau ngót: 300g (2 mớ) - Thịt lợn nạc thăn: 150g - Nước mắm, mì chính, muối. 2. Cách làm: - Rau ngót chọn lá nhỏ, tươi non, tuốt lấy lá, bỏ cọng, rửa sạch, vò hơi giập. - Thịt lợn nạc r... | [
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865,
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274,
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29875,
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30250,
29877,
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2947,
207,
137,
29876,
9922,
207,
... | [
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1,
1,
1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Giải thích vì sao năng suất lao động của hoạt động khai thác thủy sản ở nước ta còn thấp?
A. Môi trường biển bị suy thoái và nguồn lợi thủy sản suy giảm.
B. Hệ thống các cảng cá chưa đáp ứng được yêu cầu.
C. Việc chế biến th... | [
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,
22566,
207,
140,
29875,
266,
29875,
30103,
305,
3516,
30712,
872,
2... | [
1,
1,
1,
1,
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1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Đại lượng vectơ được xác định bằng thương số giữa độ dịch chuyển của vật và thời gian để vật thực hiện độ dịch chuyển đó là.
A. Tốc độ.
B. Tốc độ trung bình.
C. Vận tốc trung bình.
D. Độ dời. Đáp án là: C. Vận tốc trung ... | [
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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: Tích của đa thức 4x^5 + 7x^2 và đơn thức (-3x^3) là:
A. 12x^8 + 21x^5
B. 12x^8 + 21x^6
C. -12x^8 + 21x^5
D. -12x^8 – 21x^5 Đáp án là: D. -12x^8 – 21x^5 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Tiền thưởng hội thi thể thao của Minh là 1 000 000 đồng. Mỗi ngày Minh để dành thêm 20 000 đồng từ tiền tiêu vặt. Gọi T (đồng) là số tiền bạn Minh có sau t (ngày).
Hàm số T theo t là
A. T = 20 000 – 1 000 000. t;
B. ; T = 20 000 + 1 000 000. t;
C. T = 1 000 000 – 20 000. t;
D. T = 1 0... | [
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1,
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274,
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18439,
31343,
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266,
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228,
190,
162,
865,
298,
30902,
29... | [
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1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Số các vecto khác vecto 0, có hai đầu mút trong số 6 điểm phân biệt A,B,C,D,E,F đã cho là:
A. 3
B. 6
C. 15
D. 30 Đáp án là: D. 30 </s> | [
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325,
52... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Choose the word whose underlined part has a different pronunciation from the others in each group
A. m u sic
B. comp u ter
C. doc u ment
D. ill u strate Đáp án là: D. ill u strate </s> | [
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852,
278,
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760,
756,
263,
1422,
1150... | [
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1,
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1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Chữ số 6 trong số 986738 thuộc hàng nào? lớp nào?
A. Hàng nghìn, lớp nghìn.
B. Hàng trăm, lớp nghìn.
C. Hàng chục nghìn, lớp nghìn.
D. Hàng trăm, lớp đơn vị. Đáp án là: A. Hàng nghìn, lớp nghìn. </s> | [
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1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: 25% của một số là 100. Hỏi số đó là bao nhiêu
A. 40
B. 400
C. 25
D. 250 Đáp án là: C. 25 </s> | [
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1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is best made up from the prompts. Darwin/ who/ be/ famous/ English/ scientist/ develop/theory/ evolution/.
A. Darwin who is a famous English scientist developed a theory of evolution.
B. Darwin who was the... | [
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315,
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470,
360,
373,... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Chọn đáp án sai khi nói về dao động cưỡng bức.
A. Dao động theo quy luật hàm sin của thời gian.
B. Tần số ngoại lực tăng thì biên độ dao động tăng.
C. Tần số dao động bằng tần số của ngoại lực.
D. Biên độ dao động phụ thuộc va... | [
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1,
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1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: The other passengers will get on the bus soon. Then we'll leave.
A. We'll leave before the other passengers get on the bus.
B. As soon as the other passengers get on the bus, we'll leave.
C. Unless we don't leave, the other passengers will get on the bus.
D. Before we'll leave, the oth... | [
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1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Để điều chế Cu(OH) 2 người ta cho:
A. CuO tác dụng với dung dịch HCl
B. CuCl 2 tác dụng với dung dịch NaOH
C. CuSO 4 tác dụng với dung dịch BaCl 2
D. CuCl 2 tác dụng với dung dịch AgNO 3 Đáp án là: B. CuCl 2 tác dụng với dung dịch NaOH </s> | [
1,
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<s> Chọn đáp án đúng với câu hỏi: Mỏ Apatit tập trung chủ yếu ở tỉnh nào sau đây?
A. Lạng Sơn.
B. Bắc Giang.
C. Lào Cai.
D. Yên Bái. Đáp án là: C. Lào Cai. </s> | [
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1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Một điểm A trên mặt nước dao động với tần số 100 Hz. Trên mặt nước người ta đo được khoảng cách giữa 7 gợn lồi liên tiếp là 3 cm. Khi đó tốc độ truyền sóng trên mặt nước
A. v = 50 cm/s
B. v = 50 m/s
C. v = 5 cm/s
D. v = 0,5 cm/s Đ... | [
1,
1,
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1,
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1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Điền số thích hợp vào ô trốngChiều dài25 mChiều rộng14 mChu vi?
A. 39 m
B. 78 m
C. 68 m
D. 49 m Đáp án là: B. 78 m </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Tua giấy nhiễm điện q và tua giấy khác nhiễm điện q '. Một thước nhựa K hút cả q lẫn q’. Hỏi K nhiễm điện thế nào?
A. K nhiễm điện dương.
B. K nhiễm điện âm.
C. K không nhiễm điện.
D. Không thể xảy ra hiện tượng này. Đáp án là:... | [
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<s> Chọn đáp án đúng với câu hỏi: Phương trình nào sau đây có nghiệm kép?
A.x^2−4x−4=0
B.x^2−4x+5=0
C.x^2−4x+4=0
D.−x^2−4x+4=0 Đáp án là: C.x^2−4x+4=0 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: She tried to _______.
A. talk out of me the plan
B. talk me the plan out of
C. talk me out of the plan
D. talk out me of the plan. Đáp án là: C. talk me out of the plan </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Mark the letter A, B, C, or D to indicate the underlined part that needs correction in each of the following questions. Mary isn't happy in her new job at first but she is beginning to enjoy it now.
A. isn't
B. in
C. is
D. it Đáp án là: A. isn't </s> | [
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<s> Chọn đáp án đúng với câu hỏi: The underlined phrase “the worse the damage” in the passage means ___________.
A. The result of a great earthquake is a tsunami or fire that causes great damage.
B. Greater damage will occur from earthquakes in highly populated cities in danger zones.
C. Tsunamis and fire are caused by... | [
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<s> Chọn đáp án đúng với câu hỏi: Nguyên tố X và Y thuộc nhóm A; nguyên tử nguyên tố X có 7 electron trên các phân lớp s, nguyên tử nguyên tố Y có 17 electron trên các phân lớp p. Công thức hợp chất tạo bởi X và Y; liên kết hóa học trong hợp chất đó là
A. XY; liên k... | [
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<s> Chọn đáp án đúng với câu hỏi: Trong văn bản Và tôi nhớ khói, tại sao ki thấy khói bếp bay lên, những đứa trẻ chăn trâu lại vội vã về nhà?
A. Vì khói nhắc nhớ chúng về những bữa cơm đang nấu
B. Vì khói dự báo trời sắp mưa
C. Vì khói là tín hiệu cha mẹ gọi... | [
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<s> Chọn đáp án đúng với câu hỏi: Mark the letter A, B, C or D to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions. It took me a very long time to recover from the shock of her death.
A. keep up with
B. turn off
C. get over
D. take on Đáp án là: C. get over </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Tính và chọn đáp án đúng:12/16+24/21+5/20-7/49=.....
A. 3
B. 4
C. 2
D. 1 Đáp án là: C. 2 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: According to paragraph 3, why were the archaeologists taken aback by the Phillips’ notification?
A. Archaeologists presumed that no one would ever surrender the possession of such one-of-a-kind stones.
B. The last thing archaeologists ever expected was to get a call from someone tellin... | [
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<s> Chọn đáp án đúng với câu hỏi: Tác phẩm truyện Kiều được viết bằng ngôn ngữ nào?
A.Chữ Hán
B.Chữ Nôm
C.Chữ quốc ngữ
D.Chữ Latin Đáp án là: B.Chữ Nôm </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Ý nào KHÔNG phản ánh điểm tích cực của các cuộc phát kiến địa lý?
A. Làm sản sinh quá trình xâm lược thuộc địa.
B. Khẳng định trái đất hình cầu.
C. Mở ra những con đường mới, những vùng đất mới.
D. Tăng cường sự giao lưu buo... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: TNT (2,4,6-trinitrotoluen) được điều chế bằng phản ứng của toluen với hỗn hợp gồm HNO 3 và H 2 SO 4 đặc, trong điều kiện đun nóng. Biết hiệu suất của quá trình tổng hợp là 80%. Khối lượng TNT tạo thành từ 230 gam toluen là:
A. 454 ga... | [
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1,
1,
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1... |
<s> Chọn đáp án đúng với câu hỏi: Một điện tích chuyển động trong điện trường theo một đường cong kín. Gọi công của lực điện trong chuyển động đó là A thì
A. A > 0 nếu q > 0.
B. A > 0 nếu q < 0.
C. A > 0 nếu q < 0.
D. A = 0. Đáp án là: D. A = 0 </s> | [
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19... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Cho hàm số y = f(x) có đạo hàm trên (a;b). Nếu f'(x) đổi dấu từ dương sang âm qua điểm x_0 thì:
A. x_0 là điểm cực đại của hàm số
B. x_0 là điểm cực tiểu của hàm số
C. x_0 là điểm cực đại của đồ thị hàm số
D. x_0 là điểm cực tiểu của đồ thị hàm số Đáp án là: A. x_0 là điểm cực đại của ... | [
1,
1,
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678,
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29871,
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29976,
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29871,
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30030,
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325,
31280,
29875,
274,
30057,
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298,
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29875,
29901,
14542,
298,
30001,
29885,
269,
30984,
343,
353,
285,
29898,
29916,
... | [
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,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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 6 - 7, cho biết quần đảo Cô Tô thuộc tỉnh, thành phố nào sau đây?
A. Quảng Ninh.
B. Khánh Hòa.
C. Hải phòng.
D. Quy Nhơn. Đáp án là: A. Quảng Ninh. </s> | [
1,
1,
29871,
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30975,
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29871,
30128,
29976,
29886,
29871,
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29871,
30128,
30030,
865,
325,
31280,
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274,
30057,
29884,
298,
228,
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29875,
29901,
9243,
207,
137,
29876,
2723,
207,
158,
30103,
2947,
30712,
29877,
2... | [
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1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Nghiên cứu tốc độ gia tăng dân số ở một quần thể người với quy mô 1 triệu dân vào năm 2016. Biết rằng tốc độ sinh trung bình hàng năm là 3%, tỷ lệ tử là 1%, tốc độ xuất cư là 2% và vận tốc nhập cư là 1% so với dân số... | [
1,
1,
29871,
678,
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29876,
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30128,
29976,
29886,
29871,
1715,
29871,
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325,
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29884,
298,
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146,
29875,
29901,
405,
12443,
347,
31500,
29876,
2723,
207,
158,
30103,
29884,
304,
3... | [
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
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