đáp án A ( phía tây)
đốt cháy hoàn toàn 2,24 lít khí ankan x(đktc) thu được 6,72 lít khí CO2 và m H2O . xác định công thức phân tử của X và tính m
If I were you, I … that. * a. would apply for b. will ask for c. will have changed d. can take 2. If I … a wish, I’d wish for happiness for my family. * a. have b. been having c. had d. was having 3. If we had time, we … to the party. * a. can go b. would go c. would have gone d. will have gone 4. We couldn’t understand the teacher if he… too fast. * a. spoke b. has spoken c. doesn’t speak d. didn’t speak 5. If everything is all right, we …our work on time. * a. complete b. are completing c. have completed d. will complete 6. What… if the earth suddenly stopped going around the sun? * a. happens b. will happen c. would happen d. happened 7. Unless you… quiet, I’ll scream. * a. don’t keep b. keep c. kept d. didn’t keep 8. You’ll be able to speak English well if you… hard. * a. study b. studied c. would study d. had studied 9. If I … you, I … invitation. * a. am/ will refused b. was/ will refuse c. were/ would refuse d. had been/ will refuse 10. …. I’d have told you the answer. * a. If you asked me b. Had you asked me c. You had asked me d. Unless you asked me 11. You won't pass the examination…… you study more. * a. as long as b. unless c. if d. otherwise 12. If you don’t finish this exercise, I won’t let you out. * a. As long as you finish this exercise I won’t let you out. b. Unless you finish this exercise, I will let you out. c. Provided that you finish this exercise, I will let you out. d. If you finish this exercise, I won’t let you out. 13. She did the homework last night so she gets a high score today. * a. If she did the homework last night, she would get a high score today. b. If she didn’t do the homework last night, she wouldn’t get a high score today. c. If she hadn’t done the homework last night, she wouldn’t have got a high score today. d. If she hadn’t done the homework last night, she wouldn’t get a high score today. 14. If I had cleaned the house, I could have gone to the movie. * a. Had I cleaned the house, I could have gone to the movie. b. Had I clean the house, I could have gone to the movie. c. Had I cleaned the house, I could had gone to the movie. d. Had I cleaned the house, I could have go to the movie. 15. If she were a bird, she would fly. * a. Did she a bird, she would fly. b. Were she a bird, she would fly. c. Were she be a bird, she would fly. d. Did she be a bird, she would fly. 16. Susan..... the problem if she..... in the office right now. * a. solved _ were b. will solve _ is c. would solve _ were d. solves _ is 17. If the weather.... fine last nice, there.....roses in our garden now. * a. were _ will be b. had been _ would have been c. were _ will been d. had been_ would be 18. If I ..... the movie, I .....you about it last night. * a. saw _ would tell b. had seen _ would have been told c. had seen _ would have told d. had seen _ would tell 19. If I were forced to leave my position, I ..... upset. * a. am b. will be c. would be d. would have been 20. There ..... no shortage of water if it had rained * a. were b. would be c. would have been d. would have had
Viết đoạn văn khoảng 200 từ trình bày suy nghĩ của em về câu nói của phó thủ tướng Vũ Đức Đam " Nếu tất cả chúng ta cùng đồng lòng toàn dân Việt Nam đều đồng lòng ,toàn dân chống dịch tù nhất định chúng ta sẽ chiến thắng như dân tộc Việt Nam ta đã chiến thắng"
cho 11,9 gam hỗn hợp kim loại al và zn ( có tỉ lệ nal : nzn = 2 :1) phản ứng hết cho dung dịch h2so4. a, tính khối lượng mỗi kim loại trong hỗn hợp ban đầu b, tính khối lượng H2SO4 cần dùng
Tìm hiểu đề và lập ý cho đề bài:Thiên nhiên là người bạn tốt của con người
Đun nóng cho phản ứng xảy ra hoàn toàn hỗn hợp gồm 8,1g bột nhôm và 9,6g bột lưu huỳnh, cho sản phẩm tạo thành vào dung dịch HCl dư thì thu được hỗn khí và dung dịch A. Tính thành phần % về thể tích mỗi chất khí trong hỗn hợp.
Hãy chép thuộc lòng đoạn văn từ “ Huống chi . . . ta cũng vui lòng “ trong văn bản Hịch tướng sĩ ( Trần Quốc Tuấn ) và nêu nội dung chính của đoạn văn
Rewrite the following sentences in passive voice. 1. The mudslide buried five houses in a village in the eastern region. ___________________________________________ 2. They are cutting dead trees on some streets to prepare for the forthcoming storm. _______________________________________
Bài1 giải pt sau (X-1/2013)+(x-2/2012)+(x-3/2011)=(x-4/2010)+(x-5/2009)+(x-6/2008) Bài2giải phương trình X^4+2x^3+5x^2+4x-12=0 Bài3 tìm tất cả các cặp giá trị nguyên (x,y) thoả mãn: xy-x-3y=2 Bài 4 tìm x,y thoả mãn pt sau: x^2-4x+y^2-6y+15=2
Mọi người giúp mình với Giải các phương trình sau :
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