câu 1: so sanh phân số: a. M=13/19 MŨ 2 + 17/19 MŨ 4 và B=17/19 mũ 2+13/19 mũ 4 B. A=-93/13 mũ 6 + -97/13 mũ 8 và B=-97/13 mũ 6 + -93/13 mũ 8 các bn giúp mik với ạ cho ctlhn và tim ah

Cali: Chịu Chịu mấy thanh niên, chắc ngứa tay wa

26. Why didn’t you attend the meeting? Oh, I did not know. If I (know)……………………… I (come) ……………………..there. 27. What ……………….we(do)……………………… if they do not come tomorrow? 28. If I had enough time now, I (write) ………………………………. to my parents. 29. It’s too bad Helen isn’t here. If she (be) ………………………….. here, she (know) …………………..what to do. 30. If I (eat) …………………………… breakfast tomorrow morning, I (get) …………………………. hungry during class. 31. If she (come) ……………………………….. late again, she (lose) ……………………………her job. 32. I (let) ……………………………. you know if I (find) ……………………………………. out what’s happening. 33. If we (live) ………………………………. in a town, life would be better. 34. I’m sure he wouldn’t mind if we (arrive) ……………………………. early. 35. We (phone) ……………………………………. you if we have time. 36. If I won the lottery, I (give) ………………………………. you half the money. 37. It (be) …………………………………….. a pity if she married Fred 38. If I’m free on Saturday, I (go) ………………………….. to the mountains. 39. She (have) …………………………….. a nervous breakdown if she goes on like this. 40. I know I (feel) better if I (stop) …………………… smoking. 41. If I (be) …………………… you, I (help) ………………………… him. 42. I (understand)…………………………………….. him if he (speak) …………………………….. more slowly. 43. He didn’t listen to the teacher. If he (listen) ………………………….. carefully, he (perform) …………………… well in the examination 44. He’s waiting for his mother to come back from Chicago. If his mother (come) …………………………. home, he (have) ……………………………………. a lot of presents. 45. He wanted to buy some Christmas presents but he couldn’t. If he (afford) …………………………….. to buy, his children (be) ……………………………. very happy to greet a new year. 46. The kitchen will look better if we (have) ………………………………….. red curtains. 47. If I knew his address, I (go) ……………………….. round and see him. 48. If you (not be) ……………………. so busy, I (show) ………………………… you how to play. 49. It (be) ………………………………… quicker if you (use) a computer. 50. If we (have) ………………………………….. some eggs, I (make) ………………………………… you a cake. 51. Bring him another if he (not/like) ……………………………….. this one. 52. She (be) …………………………. angry if she (hear) …………………………. this tomorrow. 53. Unless you are more careful, you (have) …………………………….. an accident. 54. If you (like), I (get) …………………………………. you a job in this company. 55. If grandmother (be) ……………………….. 5 years younger, she (play) ………………………… some games. 56. If he sun (stop) …………………………… shinning, there (be) ………………………………………… no light on earth. 57. If I (be) ………………………………… a millionaire, I (live) ……………………. on Mars. e cảm ơn ạ

the way of life in this country is......to that in my country

Exercise 7: Put the verbs in brackets into the correct form: 1. If I (know)…………………………. that you were ill, I (go)……………………… to see you. 2. If she'd had enough money, She (buy) …………………………… a car. 3. I (buy) ……………………………………….. a car If you lend me some money. 4. I (see) …………………………… him if I (go) …………………………. to the party last night. 5. We could have gone out if the weather (not be)……………………………………… so bad. 6. If the book (not be )…………………………… expensive, I'll buy it. 7. You would be very surprised if he (return)……………………………… 8. I'll go out if it (not rain)………………………………. 9. They wouldn't come to the party if you (not invite) …………………………………..them 10. What ……………………………… you (do) ……………………. if you (be) ………………….. him? 11. If that hat costs much, I (buy) ……………………………. a small one. 12. If you (drive) ……………………...more carefully, you (have) ………………………… so many accidents. 13. If I (make) …………………………….. that mistake again, my teacher (get) ……………………… angry with me. 14. If I spoke English, my job (be) …………………………….. a lot easier. 15. If he (go) ……………………………….. to London yesterday, he ( meet) ………………………………. his old friend. 16. I will lend them some money if they (ask) …………………………….. me. 17. If we had known who he was, we (invite) ………………………….. him to speak at our meeting. 18. My dog (bark) …………………………… if it (hear) ………………………….. any strange sound. 19. If I (have) ………………………….. enough money, I would buy a house. 20. They (not/let) …………………………… you in if you (come) late. 21. If you (not go) ……………………………….. away, I (send) ……………………………… for a policeman. 22. If I (be) ………………………………… in your place, I (accept) …………………… Mr. Anderson’s invitation. 23. If I (win) ……………………………. a big prize in a lottery, I’d give up my job. 24. If I (be) ……………………………….. you, I (tell) …………………………… the truth. 25. I was busy. If I (have) …………………………..free time. I (go) ……………………………. to the cinema with you. em cảm ơn ạ

$x^{14}$-10$x^{13}$+10$x^{12}$-10 $x^{11}$+...+10$x^{2}$ -10x+10 tại x=9

Câu 8: Hình thức nào dưới đây là hình thức sinh sản của bưởi? A.phân đôi B.hữu tính C.nảy chồi D.tiếp hợp

Zẽ chibi NL : hỏi đuy tui trả lời choa =)))

21. In my experiments, the liquid is cooled to 32¬¬¬ºF. It always freezes. A. If you cool the liquid to 32 degrees, it froze. B. If you cooled the liquid to 32 degrees, it would freeze. C. If you cool the liquid to 32 degrees, it will freeze. D. If you had cooled the liquid to 32 degrees, it would have frozen. 22. It may rain this afternoon. I hope it doesn’t because I don’t want the match to be cancelled. A. If it rains, the match is cancelled. B. If it rains, the match will be cancelled. C. if it rained, the match would be cancelled. D. If it had rained, the match would have been cancelled. 23. Unfortunately, I don’t know Philosophy, so I can’t answer your question. A. If I know Philosophy, I can answer your question. B. If I know Philosophy, I will be able to answer your question. C. If I knew Philosophy, I would be able to answer your question. D. If I had known Philosophy, I would have been able to answer your question. 24. _____ there are some more ideas, we can end the meeting now. A. If B. As if C. Unless D. In case 25. If he _____ with us now, he _____ the beauty of nature of the National Park. A. is / can enjoy B. was / will enjoy C. has been / would enjoy D. were / could enjoy 26. If they had searched more carefully, they…the watch sooner. A. will find B. would find C. found D. would have found 27. If I had got up early, I _____ to have breakfast now. A. have B.I had C. would have D. would have had 28. I cannot buy a new computer _____ I save enough money. A. if B. even if C. unless D. as if 29. Most people you meet will be polite to you _____. A. if you are polite to them B. if you will be polite to them C. unless you are polite to them D. if you were polite to them 30. If you do so, it _____ the matter worse. A. makes only B. would only make C. will only make D. had only made 31. You _____ English fluently unless you practice it every day. A. will speak B. will not speak C. can speak D. did not speak 32. Hurry up _____ you will miss the bus and be late for school. A. if B. and C. or D. as 33. You will get a good seat if you _____ first. A. come B. came C. have come D. will come 34. Sam will not graduate_____. A. if he passed all the tests B. if he does not pass all the tests. C. unless he passes all the tests D. unless he had passed all the tests. 35. If I had time, I would go with you. A.I am free and surely go with you. B.I am too busy to go with you. C. I will go with you because I have time. D. I am free enough to go with you. 36. If Margaret hadn’t been wearing a seat belt, she…. Injured. A. has been B. would has been C. would be D. would have been 37. If I _____ the rain yesterday, I_____ ill. A. had not caught / would have been B. had not caught / would have not been C. have not caught / were not D. have not caught / would have been 38. He looked frightened as if he _____ a ghost. A. sees B. is seeing C. has seen D. had seen 39. What _____if there _____ a serious nuclear accident. A. will happen / was B. happens / were C. would happen / were D. would happen / had been giúp em với em cảm ơn ạ

Chứng minh đẳng thức : (x+y)^4+x^4+y^4 = 2(x^2+xy+y^2)^2