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<s> Chọn đáp án đúng với câu hỏi: The words "exposed to" in paragraph 2 most likely mean _______
A. hardened by
B. chilled with
C. subjected to
D. deprived of Đáp án là: C. subjected to </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Tử nửa sau thế kỉ XIX, các nước Đông Nam Á đứng trước thách thức lịch sử lớn nhất là gì?
A. Nguy cơ bị thực dân phương Tây xâm lược, biến thành thuộc địa
B. Chế độ phong kiến lâm vào khủng hoảng, suy yếu
C. Mâu thuẫn trong ... | [
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<s> Chọn đáp án đúng với câu hỏi: Women are increasingly involved _____the public life.
A. at
B. with
C. in
D. to Đáp án là: C. in </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Năm 1949, Trung Quốc đã
A. lâm vào suy thoái, khủng hoảng nghiêm trọng về kinh tế - xã hội.
B. lựa chọn con đường phát triển đất nước theo hướng tư bản chủ nghĩa.
C. tiến hành cải cách mở cửa để đưa đất nước thoát khỏi khủng ho... | [
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<s> Chọn đáp án đúng với câu hỏi: Quần thể ruồi nhà ở nhiều vùng nông thôn xuất hiện nhiều vào 1 khoảng thời gian nhất định trong năm (thường là mùa hè), còn vào thời gian khác nhau thì hầu như giảm hẳn. Như vậy quần thể này
A. biến động số lượng theo chu k... | [
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<s> Chọn đáp án đúng với câu hỏi: Vương triều Gúpta có vai trò to lớn trong lịch sử Ấn Độ, ngoại trừ
A. tổ chức các cuộc chiến đấu chống xâm lược, bảo vệ đất nước
B. thống nhất lãnh thổ miền Bắc Ấn Độ
C. thống nhất gần như toàn bộ miền Trung Ấn Đo... | [
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<s> Chọn đáp án đúng với câu hỏi: Có các hóa chất sau đựng riêng biệt trong các lọ mất nhãn: KCl, MgCl 2, FeCl 2, FeCl 3, AlCl 3, NH 4 Cl, (NH 4 ) 2 SO 4. Thuốc thử có thể dùng để nhận biết các hóa chất trên là
A. NaOH
B. B a ( O H ) 2
C. B a ( N O 3 ) 2
D. AgNO 3 Đáp án là: B. B a ( ... | [
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<s> Chọn đáp án đúng với câu hỏi: Đun nóng 121,5 gam xenlulozơ với dung dịch H N O 3 đặc trong H N O 3 đặc (dùng dư), thu được x gam xenlulozơ trinitrat. Giá trị của x là
A. 222,75 gam
B. 186,75 gam
C. 176,25 gam
D. 129,75 gam Đáp án là: A. 222,75 gam </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Helen and Sarah are talking about their school's field trip. Helen:"This is the best field trip we've ever had." Sarah:"_____”.Everyone enjoyed it to the fullest."
A. I don't think that's a good idea
B. I totally disagree
C. You're right
D. Never mind Đáp án là: C. You're right </s> | [
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<s> Chọn đáp án đúng với câu hỏi: I find it quite _______ that some people are very good at adapting to hot weather.
A. amazing
B. amaze
C. amazement
D. amazingly Đáp án là: A. amazing </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Red Ribbon Week, a national campaign to keep young people from using drugs, ________.
A. Annually in October
B. annually in October each year
C. takes place annually in October
D. taking place annually in October Đáp án là: D. taking place annually in October </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Phản ứng điện phân dung dịch CuCl 2 (với điện cực trơ) và phản ứng ăn mòn điện hoá xảy ra khi nhúng hợp kim Zn – Cu vào dung dịch HCl có đặc điểm giống nhau là
A. Phản ứng xảy ra luôn kèm theo sự phát sinh dòng điện
B. Phản ứng ở cu... | [
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<s> Chọn đáp án đúng với câu hỏi: Phèn nhôm (phèn chua) có công thức hóa học là
A. KAl(SO 4 ) 2.12H 2 O.
B. B, C đều đúng.
C. NaAlFe 6
D. NH 4 A1(SO 4 ) 2.12H 2 O. Đáp án là: A. KAl(SO 4 ) 2.12H 2 O. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho các polime: Tơ tằm nilon-6,6, nilon-6, nilon-7, PPF, PVA, PE. Số chất tác dụng được với dung dịch NaOH khi đun nóng là
A. 3
B. 4
C. 5
D. 6 Đáp án là: D. 6 </s> | [
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1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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<s> Chọn đáp án đúng với câu hỏi: Đô thị hóa tự phát ở đới nóng không có tác động nào sau đây?
A. Ô nhiễm môi trường.
B. Thất nghiệp, thiếu việc làm.
C. Phân bố dân cư hợp lí hơn.
D. Sinh ra nhiều tệ nạn xã hội. Đáp án là: C. Phân bố dân cư hợp lí hơn. </s> | [
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1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Cho lăng trụ tam giác ABC.A'B'C' có độ dài cạnh bên bẳng 4 và khoảng cách từ điểm A đến các đường thẳng BB', CC' lần lượt bẳng 1 và 2. Biết góc giữa hai mặt phẳng (ABB^'A^') và (ACC^'A^') bằng 60°. Thể tích khối lăng trụ ABC.A'B'C' là
A. 4√(3).
B. √(3).
C. 3√(3).
D. 2√(3). Đáp án là: D... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: My sister studies very hard,...................... she always gets good marks.
A. because
B. so
C. although
D. but Đáp án là: B. so </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Trong quá trình giảm phân ở 1 cơ thể có kiểu gen AaBbX c D X E d đã xảy ra hoán vị gen giữa các alen D và d với tần số 20%. Cho biết không xảy ra đột biến, tính theo lí thuyết, tỉ lệ loại giao tử abX c d được tạo ra từ cơ thể này la... | [
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1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Hợp chất hữu cơ X có công thức phân tử là C 8 H 6 O 4, trong phần tử có chứa vòng benzen. Lấy 1 mol X tác dụng với dung dịch AgNO 3 /NH 3 đun nóng (dư) thu được 4 mol Ag. Đun nóng 1 mol X với dung dịch chứa 4 mol NaOH loãng, cô cạn dung dịch... | [
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<s> Chọn đáp án đúng với câu hỏi: Nhằm thủ tiêu những tàn tích của chế độ phong kiến, đem lại các quyền tự do, dân chủ cho nhân dân, ngày 26/10/1917 (theo lịch Nga), Chính quyền Nga Xô viết đã
A. thông qua Chính sách kinh tế mới do Lê-nin soạn thảo.
B. phát động cuộc đâ... | [
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315... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Đọc đoạn trích sau và trả lời các câu hỏi: Ấy là Huy Cận đó - nhưng một thi sĩ "thiên nhiên" như chàng thì ở nơi nào chẳng được, ở thời nay cũng như ở thời xưa; chàng như không ở trong thời gian mà chỉ ở trong không gian; ngườ... | [
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<s> Chọn đáp án đúng với câu hỏi: Duong and Daisy are talking about Duong's IELTS test. - Duong: “I'm taking my IELTS test tomorrow.” - Daisy: “____________”
A. Good job
B. Good luck
C. Good fortune
D. Good outcome Đáp án là: B. Good luck </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Khi cho giấy quỳ tím ẩm vào bình chứa khí amoniac thì giấy quỳ
A. chuyển sang màu đỏ.
B. mất màu.
C. chuyển sang màu xanh.
D. không chuyển màu. Đáp án là: C. chuyển sang màu xanh. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: “She is an excellent actress!” “You _____ again!”
A. can say that
B. may say it
C. say it
D. say that Đáp án là: A. can say that </s> | [
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<s> Chọn đáp án đúng với câu hỏi: All _____ must complete a visa form upon arrival at Singapore airport.
A. tourists
B. departures
C.customers
D. passengers Đáp án là: D. passengers </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Cho các chất: H 2 N − ( C H 2 ) 4 − C H ( N H 2 ) − C O O H, ( C H 3 ) 2 C H − C H ( N H 2 ) − C O O H, H 2 N − C H 2 − C O O H, H 2 N − ( C H 2 ) 2 − C H ( N H 2 ) − C O O H. Số chất làm quỳ tím đổi thành màu xanh?
A. 1
B. 2
C. 3
D. 4 Đáp án là: C. 3 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: one in five youngsters (30) ________ anything between
A. Puts
B. Gets
C. brings
D. makes Đáp án là: B. Gets </s> | [
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1,
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1... |
<s> Chọn đáp án đúng với câu hỏi: Thủy phân hoàn toàn 143,45 gam hỗn hợp A gồm hai tetrapeptit thu được 159,74 gam hỗn hợp X gồm các amino axit (các amino axit đều chỉ chứa 1 nhóm -COOH và 1 nhóm - N H 2 ). Cho toàn bộ X tác dụng với dung dịch HCl dư, sau đó cô cạn dung dịch th... | [
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<s> Chọn đáp án đúng với câu hỏi: I always learn _______ lot of things at school.
A. a
B. much
C. many
D. so Đáp án là: A. a </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Chọn thêm một thuốc thử để nhận biết các dung dịch chứa trong lọ riêng đã mất nhãn: Ba(OH) 2, NaOH, H 2 SO 4, HNO 3
A. HCl.
B. HNO 3
C. H 3 PO 4
D. H 2 SO 4. Đáp án là: C. H 3 PO 4 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Biến đổi nào của khu vực Đông Bắc Á sau chiến tranh thế giới thứ hai đã góp phần làm thay đổi bản đồ địa chính trị thế giới
A. Hàn Quốc, Hồng Công, Đài Loan trở thành con rồng kinh tế Châu Á
B. Nhật Bản trở thành nền kinh tê... | [
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<s> Chọn đáp án đúng với câu hỏi: Bạn An lấy ngẫu nhiên một viên bi trong hộp bi có chứa 5 viên bi đỏ và 1 viên bi xanh có cùng kích thước. Cho các biến cố sau:
A: “An lấy được viên bi màu đỏ”;
B: “ An lấy được viên bi màu trắng”;
C: “An lấy được viên bi màu xanh hoặc màu đỏ”.
Phát biểu đúng là:
A. Biến cố A là biến c... | [
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<s> Chọn đáp án đúng với câu hỏi: My new sofa is....... than the old one.
A. more comfortable
B. comfortably
C. more comfortabler
D. comfortable Đáp án là: A. more comfortable </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Kết quả của phép nhân 45 × 11 là:
A. 90;
B. 195;
C. 495;
D. 594. Đáp án là: C. 495; </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Ông được nhà nước phong tặng giải thưởng Hồ Chí Minh về văn học nghệ thuật đợt I năm bao nhiêu?
A. 1995
B. 1996
C. 1997
D. 1998 Đáp án là: B. 1996 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Hãy sắp xếp các axit dưới đây theo tính axit giảm dần: CH 3 COOH, C 2 H 5 COOH, CH 3 CH 2 CH 2 COOH 3, ClCH 2 COOH 4, FCH 2 COOH 5
A. 5 > 1 > 4 > 3 > 2
B. 1 > 5 > 4 > 2 > 3
C. 5 > 1 > 3 > 4 > 2
D. 5 > 4 > 1 > 2 > 3 Đáp án là: D. 5 > 4 > 1 > 2 > 3 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Hội nghị BCH Trung ương Đảng Cộng sản Đông Dương lần thứ 6 đặt dưới sự chủ trì của Tổng Bí thư
A. Phan Đăng Lưu.
B. Lê Hồng Phong.
C. Hà Huy Tập.
D. Nguyễn Văn Cừ. Đáp án là: D. Nguyễn Văn Cừ </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Phân số nào bằng 3/7 :
A. 28/49
B. 30/56
C. 36/84
D. 15/42 Đáp án là: C. 36/84 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Chọn đáp án đúng điền vào ô trống:Tính bằng cách thuận tiện: (52×36)/(26×18)=(...)/(...)
A. 2/1
B. 2/4
C. 1/4
D. 4/1 Đáp án là: D. 4/1 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Teenagers enjoy............... to music and............... out with friends.
A. listen – hang
B. to listen – to hang
C. listening – hang
D. listening – hanging Đáp án là: D. listening – hanging </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Phần lớn lãnh thổ châu Phi có khí hậu
A. ấm khô
B. nóng ẩm
C. khô nóng
D. lạnh khô Đáp án là: C. khô nóng </s> | [
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<s> Chọn đáp án đúng với câu hỏi: 2m 5cm =..... cm.
A. 250
B. 205
C. 25
D. 2500 Đáp án là: B. 205 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: I.Choose the word that has the underlined part pronounced differently from the others.
A. deli c ious
B. spe c ial
C. recy c le
D. physi c ian Đáp án là: C. recy c le </s> | [
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393,
756,
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<s> Chọn đáp án đúng với câu hỏi: Thuận lợi căn bản nhất được tạo ra từ hiệp định Pari năm 1973 giúp nhân dân Việt Nam tiến lên giải phóng hoàn toàn miền Nam là gì?
A. Mĩ công nhận các quyền dân tộc cơ bản của Việt Nam
B. Chính quyền Việt Nam Cộng hòa đồng ý t... | [
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298,
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29901,
498,
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31500,
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658,
207,
158,
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5777,
... | [
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1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Hòa tan hết 23,76 gam hỗn hợp X gồm FeCl 2 ; Cu và Fe(NO 3 ) 2 vào 400 ml dung dịch HCl 1M thu được dung dịch Y. Cho từ từ dung dịch chứa AgNO 3 1M vào Y đến các phản ứng hoàn thấy đã dùng 580ml, kết thúc thu được m gam kết tủa và thoát ra ... | [
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29... | [
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1,
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1... |
<s> Chọn đáp án đúng với câu hỏi: Choose the sentence A, B, C or D which in closest in meaning to the printed sentence. A picture was stolen by art thieves. It was painted by Munch.
A. Stolen by art thieves, a picture was painted by Munch.
B. Painted by Munch, a picture was stolen by art thieves.
C. A picture painted b... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Mary: "Would you mind lending me your pencil?" - John : "........................................................................................................................................ "
A. Not at all
B. Yes, here it is
C. Yes, let's
D. Great Đáp án là: A. Not at all </s> | [
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<s> Chọn đáp án đúng với câu hỏi: I'd be over the moon if I ___________ a chance to go to Disneyland in California.
A. have
B. had
C. will have
D. would have Đáp án là: B. had </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Trong quá trình dao động của một con lắc đơn thì tại vị trí cân bằng
A. động năng đạt giá trị cực đại
B. thế năng đạt giá trị cực đại
C. cơ năng bằng không
D. thế năng bằng động năng Đáp án là: A. động năng đạt giá trị cực đại </... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Câu nào sau đây đúng?
A. Nếu không có lực tác dụng vào vật thì vật không thể chuyển động được.
B. Không cần có lực tác dụng vào vật thì vật vẫn chuyển động tròn đều được.
C. Lực là nguyên nhân duy trì chuyển đọng của một... | [
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<s> Chọn đáp án đúng với câu hỏi: Việc ghép song song các nguồn điện giống nhau thì có được bộ nguồn có
A. suất điện động lớn hơn các nguồn có sẵn.
B. suất điện động nhỏ hơn các nguồn có sẵn.
C. điện trở trong nhỏ hơn các nguồn có sẵn.
D. suất điện động... | [
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<s> Chọn đáp án đúng với câu hỏi: Nếu chiều cao và cạnh đáy của một hình chóp tứ giác đều cùng tăng lên 3 lần thì thể tích của nó cũng tăng lên
A. 18 lần.
B. 27 lần.
C. 54 lần.
D. 9 lần Đáp án là: B. 27 lần. </s> | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Một đoạn dây dẫn thẳng MN dài có dòng điện I=5A đặt trong từ trường đều có cảm ứng từ B=0,5T. Lực từ tác dụng lên đoạn dây có độ lớn F = 7, 5.10 - 2 N Tính góc a hợp bởi dây MN và đường cảm ứng từ?
A. 30 độ
B. 60 độ
C. 45 đo... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Một ứng dụng khá quen thuộc của hiện tượng sóng dừng trên một sợi dây đàn hồi là:
A. đo chu kì sóng.
B. đo tốc độ truyền sóng.
C. đo năng lượng sóng
D. đo pha dao động. Đáp án là: B. đo tốc độ truyền sóng. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Bộ tụ điện gồm hai tụ điện: C 1 = 20 (μF), C 2 = 30 (μF) mắc nối tiếp với nhau, rồi mắc vào hai cực của nguồn điện có hiệu điện thế U = 60 (V). Điện tích của mỗi tụ điện là:
A. Q 1 = 3.10 - 3 (C) và Q 2 = 3.10 - 3 (C).
B. Q 1 = 1,2.10 - 3... | [
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<s> Chọn đáp án đúng với câu hỏi: Trong phóng xạ P 84 210 o → X + H 2 4 e, hạt nhân X có
A. 84 proton và 126 notron.
B. 126 proton và 84 notron.
C. 124 proton và 82 notron.
D. 82 proton và 124 notron. Đáp án là: D. 82 proton và 124 notron </s> | [
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1,
1,
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1,
1,
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1,
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1,
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1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Dựa vào đặc điểm có hay không có màng phospholipid kép, virus được chia làm 2 loại là
A. virus trần và virus có màng bọc.
B. virus DNA và virus RNA.
C. virus ở thực vật và virus ở động vật.
D. virus trần và virus DNA. Đáp án là: A. virus trần ... | [
1,
1,
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678,
30975,
29876,
29871,
30128,
29976,
29886,
29871,
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865,
325,
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274,
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298,
228,
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29875,
29901,
5334,
207,
158,
31214,
29874,
2947,
30712,
29877,
29871,
30128,
29874... | [
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following sentences. I hardly know the truth about Jean’s success in the institute.
A. Jean’s success in the institute was not to be known.
B. It is difficult for Jean ... | [
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4485,
278,
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319,
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350,
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315,
29892,
470,
360,
373,... | [
1,
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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: Đa thức b^5 + b^3 + b + b^4 + b^2 + 1 được viết thành
A. (b^2 + b – 1)(b + 1)(b^2 – b + 1);
B. (b^2 + b – 1)(b – 1)(b^2 – b + 1);
C. (b^2 + b + 1)(b + 1)(b^2 – b + 1);
D. (b^2 + b + 1)(b – 1)(b^2 + b – 1). Đáp án là: C. (b^2 + b + 1)(b + 1)(b^2 – b + 1); </s> | [
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1,
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289,
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718,
289,
... | [
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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: Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions. The Forbidden City is the former imperial palace in the center of Beijing, China. Construction began in 1406, and the emperor's court officially mo... | [
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865,
325,
31280,
29875,
274,
30057,
29884,
298,
228,
190,
146,
29875,
29901,
7523,
278,
1494,
13382,
322,
2791,
278,
5497,
319,
29892,
350,
2989... | [
1,
1,
1,
1,
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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... |
<s> Chọn đáp án đúng với câu hỏi: Ancol etylic được điều chế từ tinh bột bằng phương pháp lên men với hiệu suất toàn bộ quá trình là 90%. Hấp thụ toàn bộ lượng CO 2 sinh ra khi lên men m gam tinh bột vào nước vôi trong thu được 330 gam kết tủa và dung dịch X. Biết... | [
1,
1,
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865,
325,
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29875,
274,
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298,
228,
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29875,
29901,
530,
1054,
634,
29891,
506,
29871,
30128,
29884,
207,
158,
29877,
2... | [
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... |
<s> Chọn đáp án đúng với câu hỏi: Cho Cu vào dung dịch H 2 SO 4 loãng tác dụng với chất X ( một loại phân bón hóa học ), thấy thoát ra khí không màu hóa rắn trong không khí. Mặt khác, khi X tác dụng với dung dịch NaOH thì cố mùi khai thoát ra. Chất X là
A. amophot
B. urê
C. n... | [
1,
1,
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678,
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29876,
29871,
30128,
29976,
29886,
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865,
325,
31280,
29875,
274,
30057,
29884,
298,
228,
190,
146,
29875,
29901,
14542,
10406,
2947,
30712,
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270,
686,
652,
31214,
305,
379,
2... | [
1,
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1,
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1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Nhân vật trữ tình của bài thơ Mây và sóng là:
A. Mây
B. Sóng
C. Em bé
D. Mẹ Đáp án là: C. Em bé </s> | [
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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 nhà máy phát điện gồm n tổ máy, mỗi tổ máy có cùng công suất P. Điện sản xuất ra được truyền đến nơi tiêu thụ với hiệu suất H. Hỏi nếu khi chỉ còn một tổ máy thì hiệu suất H’ bằng bao nhiêu (tính theo n và H)
A. H ' = H... | [
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611,
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1374,... | [
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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: Khi nói về mối quan hệ giữa sinh vật chủ - sinh vật kí sinh và mối quan hệ con mồi - sinh vật ăn thịt, phát biểu nào sau đây đúng?
A. Sinh vật kí sinh có kích thước cơ thể nhỏ hơn sinh vật chủ.
B. Sinh vật kí sinh bao giờ cũng có s... | [
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1,
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476,
2918,
694,
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2730,
31500,
30103,... | [
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Trong các bazơ sau: NaOH, Ca(O H ) 2, Mg(O H ) 2, Fe(O H ) 2, Fe(O H ) 3 các bazơ bị phân hủy bởi nhiệt là?
A. Ca(OH ) 2, Mg(O H ) 2, Fe(OH ) 2
B. NaOH,Ca(O H ) 2, Mg(O H ) 2
C. Mg(O H ) 2, Fe(O H ) 2, Fe(O H ) 3
D. Ca(O H ) 2, Mg(O H ) 2, Fe(O H ) 3 Đáp án là: C. Mg(O H ) ... | [
1,
1,
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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: I’m too tired to walk home. I think I ___________ a taxi.
A. will get
B. am getting
C. am going to get
D. get Đáp án là: A. will get </s> | [
1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Trong phương trình phản ứng hạt nhân A + B → C + D; gọi m 0 = m A + m B, m = m C + m D là tổng khối lượng nghỉ của các hạt nhân tương tác và tổng khối lượng nghỉ của các hạt nhân sản phẩm. Phản ứng hạt nhân là tỏa năng lượng khi:
A. m... | [
1,
1,
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678,
30975,
29876,
29871,
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274,
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298,
228,
190,
146,
29875,
29901,
1605,
549,
1374,
29884,
207,
158,
29877,
207,
158,
865,
3367,
30712... | [
1,
1,
1,
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1,
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1,
1,
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1,
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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: Đặt điện áp u = U 2 cos ω t + φ (U và u) không đổi) vào hai đầu đoạn mạch A B. Hình bên là sơ đồ mạch điện và một phần đồ thị biểu diễn sự phụ thuộc của điện áp u M B giữa hai điểm M, B theo thời gian t khi K mở và khi K đóng. Biế... | [
1,
1,
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678,
30975,
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29886,
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865,
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31280,
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274,
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298,
228,
190,
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29875,
29901,
29871,
30250,
29874,
31214,
207,
137,
29873,
29871,
30128,
347,
31214... | [
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
1,
1,
1,
1,
1,
1... |
<s> Chọn đáp án đúng với câu hỏi: Nhận định nào sau đây không đúng về mùa nóng và mùa lạnh ở Bán cầu Bắc?
A. Thời gian mùa nóng là 186 ngày
B. Thời gian mùa lạnh là 179 hoặc 180 ngày (năm nhuận)
C. Mùa nóng ngày dài hơn đêm và mùa lạnh thì ngược lại
D. Chênh lệch t... | [
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<s> Chọn đáp án đúng với câu hỏi: Please don't _________ a word of this to anyone else, it's highly confidential.
A. breathe
B. speak
C. pass
D. mutter Đáp án là: A. breathe </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Oxi hóa 0,16 mol một ancol đơn chức, thu được hỗn hợp X gồm 1 axit cacboxylic, 1 anđehit, ancol dư và H 2 O. Ngưng tụ toàn bộ X rồi chia làm 2 phần bằng nhau. Ph ầ n 1 cho tác dụng hết với Na dư, thu được 1,008 lit khí H 2 (đktc). Phần 2 cho ... | [
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<s> Chọn đáp án đúng với câu hỏi: (Câu 10 Đề thi Thử nghiệm 2017): Hai dao động điều hòa cùng phương, cùng tần số được gọi là hai dao động ngược pha nếu độ lệch pha của chúng bằng
A. π 2 + k π 4 v ớ i k ∈ Z
B. π 2 + 2 k π v ớ i k ∈ Z
C. π + 2 k π v ớ i k ∈ Z
D. π + k π 4 v ... | [
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<s> Chọn đáp án đúng với câu hỏi: Cho các trường hợp có lực điện từ tác dụng sau đây: Các trường hợp có lực điện từ nằm ngang hướng sang trái trên hình vẽ gồm:
A. c, d.
B. a, b.
C. a.
D. Không có. Đáp án là: B. a, b. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Khi nói về ưu thế lai, có bao nhiêu phát biểu sau đây không đúng? (1) Ưu thế lai biểu hiện cao nhất ở đời F 1, sau đó giảm dần qua các thế hệ. (2) Ở con lai, ưu thế lai cao hay thấp không phụ thuộc vào trạng thái dị hợp tử về nhi... | [
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<s> Chọn đáp án đúng với câu hỏi: Em bé trong bài Mây và sóng có nhu cầu gì khi nói rằng Nhưng làm thế nào mình lên đó được?
A. Muốn đi chơi cùng mây.
B. Muốn đi chơi cùng mây và cùng mẹ.
C. Không muốn đi chơi mà ờ nhà với mẹ dù rất muốn đi.
D. Ý A và B là ý đúng... | [
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<s> Chọn đáp án đúng với câu hỏi: Tỉ số và tỉ số phần trăm của số 12kg và 0,3 tạ lần lượt là:
A. 2/5;40%
B. 2/5;45%
C. 1/2;45%
D. 9/2;40% Đáp án là: A. 2/5;40% </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Tỉ lệ phần trăm của môn Cầu lông là:
A. 11%;
B. 28%;
C. 12%;
D. 49%. Đáp án là: B. 28%; </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Mạch điện nào sau đây có hệ số công suất lớn nhất?
A. Điện trở thuần R 1 nối tiếp với điện trở thuần R 2.
B. Điện trở thuần R nối tiếp với cuộn cảm L.
C. Điện trở thuần R nối tiếp với tụ điện C.
D. Cuộn cảm L nối tie... | [
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<s> Chọn đáp án đúng với câu hỏi: H 3 PO 4 là axit
A. có tính oxi hoá mạnh.
B. có tính oxi hoá yếu.
C. không có tính oxi hoá mạnh.
D. vừa có tính oxi hoá vừa có tính khử. Đáp án là: C. không có tính oxi hoá mạnh. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Trên cơ sở phân tích tình hình nước ta sau Cách mạng tháng Tám, ngày 25-11-1945, Trung ương Đảng đã đề ra
A. Chỉ thị “Nhật- Pháp bắn nhau và hành động của chúng ta”.
B. quyết định cải tổ Ủy ban Dân tộc giải phóng thành Chính phủ lâm th... | [
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<s> Chọn đáp án đúng với câu hỏi: Dung dịch nào sau đây phản ứng với dung dịch HCl dư tạo ra chất khí?
A. Na 2 CO 3
B. Ca(NO 3 ) 2
C. K 2 SO 4
D. Ba(OH) 2 Đáp án là: A. Na 2 CO 3 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Chuyển dịch cơ cấu kinh tế trong nội bộ ngành công nghiệp nước ta là:
A. tăng tỉ trọng công nghiệp chế biến.
B. giảm tỉ trọng sản phẩm cao cấp.
C. tăng tỉ trọng công nghiệp khai thác
D. tăng tỉ trọng sản phẩm chất lượng trung bìn... | [
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1,
1,
1,
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<s> Chọn đáp án đúng với câu hỏi: "Thời cơ ngàn năm có một" trong Cách mạng tháng Tám tồn tại trong thời gian nào?
A. Từ khi Mĩ ném bom nguyên tử xuống Hirôsima và Nagaxaki của Nhật.
B. Từ khi Chiến tranh thế giới hai kết thúc ở châu Âu (5/1945).
C. Sau khi Nhật đầu ha... | [
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<s> Chọn đáp án đúng với câu hỏi: Một quần thể động vật, AA quy định lông đen; Aa quy định lông vàng; aa quy định lông trắng. Thế hệ xuất phát của quần thể có 0,25AA : 0,5Aa : 0,25aa. Theo lí thuyết, có bao nhiêu phát biểu sau đây đúng? I. Nếu các cá thể có cùng màu lo... | [
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3150... | [
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1... |
<s> Chọn đáp án đúng với câu hỏi: Một vật được ném ngang với vận tốc v 0 → từ độ cao h so với mặt đất ở nơi có gia tốc rơi tự do g. Phương trình quỹ đạo của vật là:
A. x = v 0 t
B. y = 1 2 g t 2
C. y = g 2 v 0 2 x 2
D. A và B Đáp án là: C. y = g 2 v 0 2 x 2 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Quốc tế thứ nhất được thành lập vào thời gian nào? Ở đâu?
A. Ngày 29-8-1864, Quốc tế thứ nhất thành lập. Tại Luân Đôn (Anh)
B. Ngày 20-9-1864, Quốc tế thứ nhất thành lập. Tại Pa-ri (Pháp)
C. Ngày 28-9-1864, Quốc tế thứ nhất tha... | [
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<s> Chọn đáp án đúng với câu hỏi: Mạch điện xoay chiều chỉ có tụ điện với điện dung C. Đặt vào hai đầu tụ điện một điện áp xoay chiều có biểu thức u = U 0 cos(ωt + φ) V. Cường độ dòng điện tức thời của mạch có biểu thức là
A. i = U 0 C ω cos ω t + φ - π 2 A
B. i = U... | [
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<s> Chọn đáp án đúng với câu hỏi: The English Speaking test was....... than I thought it would be.
A. the easier
B. more easy
C. easiest
D. easier Đáp án là: D. easier </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Đâu là giá trị nghệ thuật của truyện?
A. Xây dựng hình tượng quen thuộc, gần gũi
B. Tình huốn bất ngờ, hài hước
C. Cách nói ẩn dụ, tự nhiên kết hợp hình ảnh đặc sắc
D. Tất cả đáp án trên Đáp án là: D. Tất cả đáp án trên </... | [
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<s> Chọn đáp án đúng với câu hỏi: diện tích đất canh tác bình quân theo đầu người của nước ta có xu hướng giảm dần chủ yếu là do
A. khả năng mở rộng diện tích không còn nhiều trong khi dân số không ngừng tăng.
B. dân số tăng nhanh, nguồn lao động dồi dào.
C. đa... | [
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<s> Chọn đáp án đúng với câu hỏi: Một điện tích chuyển động trong điện trường theo một đường cong kín. Gọicông của lực điện trong chuyến 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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<s> Chọn đáp án đúng với câu hỏi: Thuỷ phân hoàn toàn 10 gam một lipit trung tính cần 1,68 gam KOH. Từ 1 tấn lipit trên có thể điều chế được bao nhiêu tấn xà phòng natri loại 72%.
A. 1,428
B. 1,028
C. 1,513
D. 1,628 Đáp án là: A. 1,428 </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Có bao nhiêu mảng kiến tạo lớn?
A. 6.
B. 7.
C. 8.
D. 9. Đáp án là: B. 7. </s> | [
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<s> Chọn đáp án đúng với câu hỏi: Chiến thắng biên giới Tây Nam của quân dân ta có ý nghĩa như thế nào?
A. Tạo thời cơ thuận lợi cho cách mạng Cam-pu-chia giành thắng lợi
B. Tiêu diệt hoàn toàn chế độ Pôn-pốt - Iêng-xê-ri
C. Tăng cường tình đoàn kết của ba nước... | [
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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 answer to each of the following questions. SCIENCE FLYING IN THE FACE OF GRAVITY It looked just like another aircraft from the outside. The pilot told his young passengers that it w... | [
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<s> Chọn đáp án đúng với câu hỏi: Mark the letter A, B, C or D on your answer sheet to indicate the sentence that best completes each of the following exchanges. Store assistant: “What’s wrong with your computer?” Customer: “______________”
A. The screen is blank.
B. I want to buy a new computer.
C. My computer cost a ... | [
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29892,
350,
29892,
315,
470,
360,
373,
596,
... | [
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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: Cho X, Y là hai axit cacboxylic đơn chức mạch hở (M X < M Y ); T là este hai chức tạo bởi X, Y và một ancol no mạch hở. Đốt cháy hoàn toàn 12,38 gam hỗn hợp E gồm X, Y, T bằng một lượng vừa đủ O 2, thu được 0,47 mol CO 2 (đktc) và 0,33 mol H ... | [
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,
1060,
29892,
612,
425,
30712,
447,
29875,
4853,
277,
274,
56... | [
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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 α- amino axit X chỉ chứa 1 nhóm amino và 1 nhóm cacboxyl. Cho 10,68 gam X tác dụng với HCl dư thu được 15,06 gam muối. Tên gọi của X là
A. Glixin
B. Anilin
C. Alanin.
D. axit Glutamic Đáp án là: C. Alanin. </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,
19883,
29899,
626,
1789,
4853,
277,
1060,
... | [
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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: Phương trình │x - 2│ = -2 có số nghiệm là:
A. một nghiệm.
B. hai nghiệm.
C. Vô số nghiệm.
D. Vô nghiệm. Đáp án là: D. Vô nghiệm </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,
1963,
30416,
30556,
865,
534,
30097,
29876,
29882,
11879,
29916,
448,... | [
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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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