Đốt cháy hoàn toàn 10.2g một hỗn hợp gồm 2 ankan đồng đẳng kế tiếp nhau sinh ra 15.68 lít CO2 ở đktc Xác định CTPT của 2 ankan Tính %khối lượng của mỗi ankan trong hỗn hợp

Jim works very hard. He has no time to spend with his family. (Conditional type II) If Jim _________________________________________________________________________________ 2. We don’t have a big house. We can’t invite friends to stay. I wish we ______________________________________________________________________________ 3. I know how to do it because are here to help me. (Without something = If (not)) Without your help, ______________________________________________________________________ 4. People in the world don’t speak the same language, so there are problems in communication. (Conditional type II) There would be _________________________________________________________________________ 5. We left a bit too late, so we couldn’t visit Ivy on the way. (Conditional type III – If had P2, S would have P2) If we _________________________________________________________________________________ 6. The gentleman was very young. He was introduced as the most successful businessman. (Relative clause) The gentleman _________________________________________________________________________ 7. I asked the hotel porter to wake me up at 7 o’clock the following morning. “Please _______________________________________________________________________________ 8. I went to the zoo last week and that was where I saw a real tiger for the first time. Before I _______________________________________________________________________________ 9. We don’t go on holiday because we do not have enough money. If we _________________________________________________________________________________ 10. Mrs. Green is proud of her son’s contribution to the play. (contributed) Mrs. Green is proud of what _______________________________________________________________ 11. People consider Vietnamese coffee to be one of the best in the world. Vietnamese coffee _______________________________________________________________________ 12. People who read newspaper know what’s going on in the world. If you _________________________________________________________________________________ 13. When I feel hungry in the afternoon, I usually have snacks like biscuits and rice crackers. If I ___________________________________________________________________________________ 14. Scuba diving is not really my cup of tea. I am _________________________________________________________________________________ 15. Jane hasn’t decided where to go on holiday. (mind) Jane hasn’t ____________________________________________________________________________

chứng minh rằng a,b,c thuộc Z thì: a(b+c) - b(a+c) = b(a-c) - a( b-c)

Trong câu"Và chủ nhân chiếc nhà sàn này cx như trang phục hết sức giản dị,vs bộ quần áo bà ba nâu,chiếc áo trấn thủ ,đôi dép lớp thô sơ như của các chiến sĩ Trường Sơn đã đc một tác giả phương Tây ca ngợi như một vật thần kì".Trong đoạn trích đc sử dụng biện pháp tu từ gì?Và nêu tác dụng của các biện pháp tu từ đó??

Giúp mình với các bạn nhé . Thank you verry much

CM 12 + 4m ² > 0

Cho các ĐV sau: ốc sên, cá chép, mực, thủy tức, ếch, giun kim, cá sấu, tôm, giun đũa, sứa, san hô, rắn, sán dây, hải quỳ, chim bồ câu, sán lá máu, chó, châu chấu. Các ĐV này có HTK dạng nào? So sánh khả năng phản xạ và tiêu tốn năng lượng của các nhóm ĐV trên

Giúp mình với nhé . Cảm ơn các bạn nhiều

Cho đường tròn (O;R) đường kính AB,dây CD cắt đường kính AB( có giao điểm khác A,B,O).Gọi H và K theo thứ tự là chân các đường vuông góc kẻ từ A và B đến đường thẳng CD. Biết HK=2a và khoảng cách từ O đến CD bằng d. Tính độ dài đoạn thẳng CK và DH theo a,d,R

6. My mother _________ the housework everyday. A. does B. makes C. goes D. plays 7. Our city has ………..university. A. an B. a C. the D. some 8. My son plays tennis very ………………… A. good B. great C. well D. bad 9. My children are really looking forward ………………..Christmas. A. at B. on C. to D. for 10. I am reading an interesting ……………about sports in the paper. A. articles B. news C. information D. reporting 11, Maria tried to read a novel in French, _________ it was too difficult. A. and B. but C. or D. so 12, He lives in London, _________ he studies at a college. A. and B. but C. or D. so 13,. Dick doesn’t …… cold weather, he …… hot weather. A. like/prefer B. likes/prefer C. like/prefers D. likes/prefers 14,. Dick: How often do you visit your grandparents? Daisy: I visit my grandparents ……, in the summer and New Year. A. twice a year B. two a year C. once a year D. one a year 15, . Dick: What do you usually do in your free time? Daisy: I usually ……. A. go fish B. go fishes C. going fish D. go fishing 16. You can go to the tourist office _________ ask them for any information you need. A. and B. but C. or D. so 17. Geraldine Chaplin is a great actress _________ she is less well-known than her father Charlie Chaplin. A. although B. but C. or D. so 18. Ha: Would you like some fruit? - Mai: Yes. I’d like …… orange or …… banana. A. a /a B. an/an C. a/an D. an/a 19. Dick: What’s the matter with you, Daisy? Daisy: Oh, I’m tired. I’d like …… down. A. to sit B. sit C. sits D. to sits 20, ………………..it’s raining, Mai’mom is working in the garden. A, Because B, Although C, But , Because of