Ta có: \(-\frac{5151}{7373}=\frac{-51.101}{73.101}=-\frac{51}{73}\)

Vậy \(-\frac{51}{73}=-\frac{5151}{7373}\).

a) Liz lived a long way from Ba.

=> Liz lived next door to Ba.

b) Liz learned Vietnamese in the USA.

=> Liz learns Vietnamese in Vietnam.

c) Liz collects stamps.

=> Liz doesn't collect stamps.

d) Liz's aunt lives in Viet Nam.

=> Liz's aunt lives in New York.

e) The Robinsons moves to Ho Chi Minh City.

=> The Robinson didn't move to Ho Chi Minh City. They moved to a new apartment in the other side of Ha Noi.

f) The Robinsons moved. Now Ba is happy.

=> The Robinson moved. Ba is not happy or sad because he and Liz can keep in touch.

g) Ba is never going to see Liz again.

=> Ba is going to see Liz again.

Complete the conditionals sentence:

1. If I (know) _____had known______ that you were ill, I (go) _____would have gone_____ to see you.

2. If she'd had some money, she (buy)____would have bought_____ to see you.

3. I (buy)__will___ a car If you lend me some money.

4. I (see) ___would have seen____ him if I (go) ____had gone____ to the party last night.

5. We could have gone out if the weather (not be) ______hadn't been______ so bad.

6. If the book (not be) ____is not_____ expensive, I'll buy it.

7. You would be surprised if he (return)________returned_______.

8. I'll go out if it (not rain) _______doesn't rain_______.

9. They wouldn't come to the party if you (not invite) _____didn't invite_____ them.

10. What __would__ you (do) ____do____ if you (be) __were__ him?

11. If that hat costs much, I (buy) ___will buy___ a small one.

12. If you (drive) _____drove____ more carefully, you (not, have) _______wouldn't have_______ so many accidents.

13. If I (make) _____make____ that mistake again, my teacher (be) ___will be___ angry with me.

14. If I spoke English, my job (be) ___would be___ a lot easier.

15. If he (go) __had gone___ to London yesterday, he (meet) __would have met__ his old friend.

16. If I (be) _____were____ in your place, I (accept) ____would accept____ Mr. Anderson' s invitation.

17. If I (win) ____won____ a big prize in the lottery, I 'd give up my job.

18. If I (be) ____were_____ you, I (tell) _____would tell____ the truth.

19. I was busy. If I (have) _____had had_____ free time, I (go) ___would have gone___ to the cinema with you.

20. - Why didn't you attend the meeting?

- Oh, I did not know! If I (know) ____had known_____ I (come) ___would have come___ there.

các bạn biết tại sao tui lại giỏi tiếng anh vậy ko? (vì tui đang học ở nước ngoài nha)

Sau khi thụ phấn, hạt phấn trương lên và nảy mầm thành ống phấn do hút chất nhầy. Ống phần xuyên qua đầu và vòi nhụy, tiếp xúc với noãn rồi chui vào noãn. Khi đó, tế bào sinh dục đực của hát phấn kết hợp với tế bào sinh dục cái của noãn tạo thành một tế bào mới gọi là hợp tử.

2 số nào phải nói rõ chứ.