luyện thi ban a

Ngày tải lên: 17/08/2013, 08:18

Ngày tải lên: 06/11/2013, 05:11

... có: 4= X Ag n n → A đúng Câu 31: Thủy phân hết m gam tetrapeptit Ala-Ala-Ala-Ala (mạch hở) thu được hỗn hợp gồm 28,48 gam Ala, 32 gam Ala-Ala và 27,72 gam Ala-Ala-Ala. Giá trị c a m là A. 90,6. B. ... gii nhanh nhng bi toỏn khú thi DH K B -2011. Ai cn thỡ liờn lc nhộ. @@@@@@@@@@@@@@HếT&&&&&&&&&&&&&&&&&&& Hiện nay tác ... D. 66,44. Giải: Ala-Ala-Ala-Ala + H 2 O → Ala + Ala-Ala + Ala-Ala-Ala 0,32 0,2 0,12mol n X = 4 12020320 ,,, ++ = 0,27 → m = (89.4 – 18.3)0,27 = 81,54 gam Lưu ý: Có n aminoaxit thì tách (n...

Ngày tải lên: 14/08/2012, 11:06

... d 290. Always make sure your luggage has on it when you travel. a. a card b. a cartel c. a label d. a traveling-bag > c 291. Last December the boss gave all his a bonus. a. employ b. employable c. ... cinema. a. the b. a c. an d. no article > a 136. My parents are always at home on Sundays. a. the b. a c. an d. no article > d 137. What's weather like in winter in your country? a. ... the jar. a. isn't b. aren't c. is d. are > a 149. Mrs. Mary me English. a. teaching b. teaches c. teach d. doesn't teaches > b d. any > a 135. Kate and Mary are going...

Ngày tải lên: 02/04/2013, 03:32

... They are tall. a. the b. a c. an d. no article > d 54. Hoa is good pupil. a. the b. a c. an d. no article > b 55. That is a bag. It is on table. a. the b. a c. an d. no article > a 56. ... Mrs. Mary me English. a. teaching b. teaches c. teach d. doesn't teaches > b d. more > d 290. Always make sure your luggage has on it when you travel. a. a card b. a cartel c. a label d. ... on Sundays. a. stay b. stays c. don't stay d. all are correct a. eleven b. big c. well d. sad > c 76. My father is a doctor. Lan's father is a doctor, too. They are doctors. a. not b....

Ngày tải lên: 02/06/2013, 01:25

... muối. a. Tính tổng số mol hai amin có trong A và nồng đôï mol/l c a dung dịch HCl. A. 0,04 mol B. 0,03 mol C. 0,02 mol D. 0,01 mol b. Nếu số mol hai amin bằng nhau, thì công thức phân tử c a hai amin. A. ... ). @.D 5 : 2  2 " 5 3KCEL  $0 2 S 2 " 5 D 2 $/":D 5 88=; 2 R 5 & 2 $ 2 $ 5  6  . 8 @ )? @8Cho hỗn hợp A gồm hai amin no đơn chức. Lấy 1,52 gam hỗn hợp A tác dụng với 200 ml dung dịch HCl (v a đủ) thì thu được 2,98 gam ... lít @>M%!&. A. V)pc4j(€:_:|$ h&%$_G07?@=qtfPzvt:""z :_=qt•$q(-S•oc&0-W$Rk&9T9tV  . E = C  = E = C  A E B C ) > E A C  @A  Cho các chất sau: (1) propin , (2) butin -1 , (3) butin -2 , (4) Vinyl axetilen , (5) propan. Chất...

Ngày tải lên: 08/06/2013, 01:25

... dung một A Phủ sinh ra từ lòng yêu q những người miền núi c a nhà văn mà thi u đi một phẩm chất cao q c a một chàng trai. Đó là lòng hào hiệp, dám phản kháng, đấu tranh và đủ sức đấu tranh, phản ... cảm say mê làm gốc rễ cho tấm lòng nhân đạo, Tô tri. Mị chẳng còn tha thi t gì ngoài việc thổi l a, hơ tay để chống lại cái rét c a đêm m a đông trên núi cao mà chẳng để ý đến bất kì ai. Tô ... mặt bất nhân c a những kẻ thống trị. Một thống lý Pá Tra lợi dụng việc con trai bị A Phủ đánh kể kiếm thêm một người ở đợ. Vì vậy Pá Tra đã chẳng thèm hỏi han xem A Sử bị đánh ra sao mà chỉ chăm...

Ngày tải lên: 23/06/2013, 01:26

... = AE = AC CF = AD = AB à à 0 180ADE DAE+ = à à à ADE AED BAC+ = Các ADF và BAC bằng nhau. Suy ra à à DAM ABC= Do vậy à à à à 0 90ABC BAx BAx DAM+ = + = Hay Ax BC tức là Ax AH. ... định. Bài 8: Từ B, D kẻ BB//DD//d Cắt AC tại, ta có: AN ADAB AP AD AM AB AD AN AD AP AB AN AB AM '' ' ' + =+=> = = mà ABB = CDD => CD = AB Bài 9: Vì BM.BC = BI 2 => ... dạng. VD: ABC đồng dạng với ABC theo tỷ số k thì 2 ' ' ' ; , ' ' ' ' ' ' ' ' ABC A B C S AB AC BC AH k k k A B A C B C S A H + + = =...

Ngày tải lên: 25/06/2013, 01:25

... is a storm approaching. singular singular There have been a number of telephone calls today. Plural plural There was an accident last night. singular singular There were too many people at ... noun) a (an), the, some, any this, that, these, those, none,one,two,three, many a lot of plenty of a large number of a great number of, a great many of. (a) few few than more than the, some, any this, ... elated by the news. The crowd was wild with excitement. Congress has initiated a new plan to combat inflation. The organization has lost many members this year. Our team is going to win the game. Các...

Ngày tải lên: 01/07/2013, 01:27

... Cho hình chóp S.ABCD có đáy ABCD là hình bình hành, góc nhọn tạo bởi hai đường chéo AC và BD là , các tam giác SAC và SBD là các tam giác đều cạnh a. Tính thể tích hình chóp theo a. ...

Ngày tải lên: 03/07/2013, 21:51

... that I not take (C) not taking (D) to not taken 18. If he had not given me advice, I ________ again. D (A) would fail (B) would be failed (C) wouldn't fail (D) would have failed 19. What ... is smoke (B) are smoking (C) are smoked (D) are smoke 13. Gold, as well as silver ________ in price, he said. B (A) have fallen (B) has fallen (C) fall (D) are falling 14. They quarelled ________ ... ________ ! The rain has not stopped all day. C (A) a weather (B) the weather (C) weather (D) an weather 20. - Which of the two boys is a boy scout? - ________ of them is. C (A) All (B) None (C)...

Ngày tải lên: 04/07/2013, 01:26

... was a little girl. A (A) has been speaking (B) spoken (C) used to speak (D) has to speak Trình độ A - Bài 2 1. My cousin ________ bank manager. A (A) is a (B) makes (C) is (D) he is 2. Claude ... ________. C (A) Frenchman (B) a French (C) a Frenchman (D) French man 3. She smokes ________. A (A) very heavily (B) much (C) very heavy (D) lot 4. She's talking to you. Please listen to ... C (A) she (B) hers (C) her (D) him 5. This isn't Bob's car. ________ is a sports car. B (A) He (B) His (C) He's (D) My 6. Jack and Tom ________ go to school yesterday. C (A) ...

Ngày tải lên: 04/07/2013, 01:26

... she's just a fast ________. A (A) talker Trình độ A - Bài 3 1. It is ________ question. C (A) not hard (B) a easy (C) an easy (D) not an hard 2. - ________? - Ten past three. A (A) What's ... work. B (A) Always Roberts catches (B) Roberts always catches (C) Roberts catches always (D) Roberts does always catches 10. I asked him ________. C (A) to not go away (B) to go not away (C) not ... away (C) not to go away (D) go not away. 11. What ________ your friend? Was she at the party? B (A) time (B) about (C) did (D) was 12. I always go shopping ________ Monday morning. A (A) on (B) by (C)...

Ngày tải lên: 04/07/2013, 01:26

... sale (C) for sell (D) sale 10. - Can we begin the test? - We can't unless the teacher ________ so. D (A) will say (B) is saying (C) shall say (D) says 11. "You are late" he said. ... hose colour was black (D) it will be vey expensive 17. The news ________ as soon as possible. D (A) release (B) will release (C) will have been released (D) will be released 18. This book is ... said. "I think the bus ________ already." C (A) went (B) was going (C) has gone (D) goes 12. We wondered who was going to pay for the ________ window. A (A) broken (B) breaking (C) broke (D)...

Ngày tải lên: 04/07/2013, 01:26

... clean the car at the weekend. B (A) hasn't have (B) doesn't have (C) doesn't has (D) don't have 14. ________ patient, and you will succeed. A (A) Be (B) Being Trình độ A ... yours' or Johns' 10. Mr Brown's friends ________ interested in your work. A (A) are (B) have (C) has (D) is 11. Someone offers you a drink. You don't want it. What do you say ... ________ a crowd in the street. B (A) It's (B) There is (C) That's (D) Is 2. Our house has four bedrooms: I have the ________. D (A) most smallest (B) more small (C) smaller (D) smallest 3....

Ngày tải lên: 04/07/2013, 01:26

... dark. A (A) up (B) in (C) off (D) out 17. This year the farmers were just able to gather in the ________ before the fine weather came to an end. D (A) collection (B) seed (C) plant (D) harvest 18. ... when 15. This is the second time that you have been here, ________? D (A) is it (B) haven't you (C) don't you (D) isn't it 16. They gave ________ looking for her when it grew dark. A (A) ... is a friend of ________. C (A) me (B) my (C) mine (D) I 6. When do you go ________ bed? A (A) to (B) to the (C) in (D) in the 7. He is ________ a jacket. A (A) wearing (B) carrying (C) that (D)...

Ngày tải lên: 04/07/2013, 01:26

... returned (C) can good be returned (D) are goods being returned 10. Frank ________ when he noticed a large packing case lying on the floor. D (A) has about to leave (B) had about to leave (C) is about ... similar to ________. D (A) that one (B) those (C) in additional (D) that 13. Margaret as well as Jane ________ here since last week. A (A) has been (B) was (C) were (D) have been 14. The doctor showed ... do. A (A) what (B) that Trình độ A - Bài 7 1. I suggest that you should ________ them about their plans. D (A) say with (B) said (C) tell to (D) speak to 2. I know somebody ________ can play...

Ngày tải lên: 04/07/2013, 01:26

Ngày tải lên: 04/07/2013, 01:26

Ngày tải lên: 04/07/2013, 01:26

Ngày tải lên: 04/07/2013, 01:26