Giải cho mình 2 bài này đi mai mik nộp rồi

`\text{Ko dùng tứ giác nội tiếp và góc nội tiếp, giải thích đc hướng vẽ đường phụ thì tốt!}` Cho `\Delta ABC` vuông cân `A`, đường cao `AH`. Dựng HCN `AHDO(D\in HC)`. `(O; OD) ∩AB=E, (O: OD) ∩AC=F`. CMR: `AE=AF`

ÔN THI IELTS BACKGROUND GIỮA KỲ A. MULTIPLE CHOICE QUESTIONS – CÂU HỎI TRẮC NGHIỆM: I. Active & Passive – Chủ động & Bị động: 1. - “The longest fish in the contest was eighteen inches long". - “It……………by Thelma Rivers” A. Was caught B. Caught C. Was catching D. Caught 2. Steve is in jail. He…………………of robbery. A. Has been convicted B. Has convicted B. C. Convicted D. Has been convicting 3. The old chicken coop………………by a windstorm last year. A. Destroy B. Was destroyed C. Is destroyed D. Destroyed 4. A new hotel……………..here next month. A. Will build B. Has been built C. Will be built D. Is going to build 5. My room………………every day A. Is cleaned B. Was cleaned C. Cleans D. Cleaned 6. I am going to have my piano…………tomorrow. A. Tuned B. Tune C. will be tuned D. Is tuned 7. English…………all over the world. A. Is used B. Are used C. Be used D. Was used. 8. This castle…………………..many centuries ago. A. Was erect B. Is erected C. Was erected D. Erected 9. Listen! A rat………….after by a cat. A. Is chasing B. Is being chased C. Is chased D. Was chased 10. This room needs……………..all the time A. To keep tidy C. To be kept tidy B. Keeping tidy D. B&C are coorect II. Conditional Sentences & Wish – Câu điều kiện & Ước: 1. If anyone treated me like that, I _________ extremely angry! A. Am B. Would be C. will be D. was 2. Rachel will not be pleased _________ she passes her driving test. A. Should B. will C. if D. unless 3. I _____ you sooner had someone told me you were in hospital. A. visited B. visit C. would have visited D. would visit 4. If everyone _____ an extra hour a day, it would greatly increase production. A. work B. works C. working D. worked 5. You…………..if you did that. A. Would be incarcerating B. Would be incarcerated B. Would incarcerate D. Had incarcerated 6. A senior doctor…………..if the president falls ill A. Will summon B. is summon C. summoned D. Will be summonedIELTS BACKGROUND Composed by Hoang Ngoc Contact: 0901.741.789 – 0979.423.777 7. If I………..you, I would not buy that dress A. Am B. Were C. Is D. Are 8. If you heat the ice, it…………. A. Will melt B. Melts C. Melting D. Is melted. 9. Such horrible mistakes ……………..if you had been more careful A. Would avoid C. Would be avoiding B. Would have avoided D. Would have been avoided 10. I wish you…………….here yesterday A. Came B. Would come C. Had come D. Will come 11. If only I……….a lot of money now. A. Had B. Have C. would have D. am having 12. He wishes he………….the competition tomorrow A. Wins B. Have won C. will win D. Would win III. Reported Speech – Câu tường thuật: 1. Julia said that she ___________ there at noon. A. is going to be B. was going to be C. will be D. can be 2. He asked her………………………. A. Where she is going C. Where is she going B. Where she was going D. Where was she going 3. He told me that he……………..to China three times. A. Has gone B. Had gone C. will go D. Would go 4. Martha asked Peter if he……………in July A. Was born B. Is born C. would be born D. Will be born 5. I asked Martha ______ to enter law school. A. are you planning B. is she planning B. Was she planning D. If she was planning. 6. Nam wanted to know what time ________. A. does the movie begin B. did the movie begin C. the movie begins D. the movie began 7. The scientist said the earth ________ the sun. A. goes round B. is going around C. went around D. was going around 8. Peter said that if he ________rich, he _________ a lot. A. is/ will travel B. were/ would travel C. had been/ would have travelled D. was – will travel 9. She said to me that she __________ to me the Sunday before. A. wrote B. has written C. was writing D. had written 10. He asked the children _________too much noise. A. not to make B. not making C. don’t make D. if they don’t makeIELTS BACKGROUND Composed by Hoang Ngoc Contact: 0901.741.789 – 0979.423.777 B. WRITING: Rewrite the following sentences: 1. Have they changed the window of the laboratory? →……………………………………………………… 2. How can they open this safe? →…………………………………………………… 3. How did the police find the lost man? →………………………………………………………… 4. What books are people reading this year? →…………………………………………………….. 5. They believe that he was incarcerated. →…………………………………………………….. 6. “Don’t leave the window open, Mary” I said →……………………………………………………… 7. “Can I borrow some money, David?” asked Martha →………………………………………………….. 8. “You should do more exercise” The doctor said to me →……………………………………………………. 9. He was scolded because he stayed out late last night →……………………………………………………… 10. I did not do well in the last examination. ➔ I wish……………………………………………….. --THE

làm ơn giúp mk vs ạ. Hứa 5* và ctlhn

giúp mình ý c và ý d với ạ mình cảm ơn nhìu lắm ạ

`\text{Ko dùng tứ giác nội tiếp và góc nội tiếp, giải thích đc hướng vẽ đường phụ thì tốt!}` Cho `M\in (O)` đường kính `AB`, `MH ⊥AB`. Tính GTLN `AH+AM`

1trình bày phương pháp tinh chế Ag bị lẫn các tạp chất Al,Zn,Fe,Cu 2chir dùng quỳ tím trình bày phương pháp nhận biết các dd riêng biệt: H2So4,bacl2,mg(hco3),naoh,nano3

làm giúp mk vs ạ. Hứa 5* và ctlhn

Giải đầy đủ giúp mk nha, cảm ơn

`\text{Ko dùng tứ giác nội tiếp và góc nội tiếp, giải thích đc hướng vẽ đường phụ thì tốt!}` Cho `A,B` cùng thuộc nửa mp bờ `xy`. Xác định `C` để `\hat{ACx}=2\hat{ACy}`