Cho ΔABC nhọn, AK là đường cao. Đường tròn tâm O đường kính BC cắt cạnh AC tại D (D khác C), H là giao điểm của đường thẳng BD và đường thẳng AK. Kẻ tiếp tuyến AM của đường tròn (O) với M là tiếp điểm. 1, Chứng minh tgiac DCKH nội tiếp 2, Chứng minh AD.AC=AH.AK=AM² 3, Giả sử tâm của đường tròn ngoại tiếp tam giác ABC thuộc đường thẳng đi qua M và vuông góc với đường thẳng AO. Chứng minh BC= $\sqrt[]{2}$AM *** Mình làm ý 1,2 rồi cần các cao nhân chỉ giáo ý 3*** Sẽ vote, TLHN ạ

16. ______ have playing cards been used for card games but also for fortune- telling. A. Not as much B. Not only C. But also D. Never 17. ______ he driving too fast, but recklessly as well. A. Not only was B. Neither was C. Was not only D. Was either 18. Only once ______ late to school. A. he came B. did he came C. came he D. did he come 19. Such ______ that he would stop at nothing. A. his ambition was B. did his ambition C. does his ambition D. was his ambition 20. Scarcely _______ the expense of new equipment ______ problem. A. should / considered B. did / be considered C. should / be considered D. was / be considered 21. Down_____ for three days last week. A. the rain poured B. did the rain pour C. poured the rain D. do the rain pour 22. ______ had the restaurant opened ______ people were flocking to eat there. A. hardly / than B. no sooner / that C. no sooner / than D. hardly / that 23. Under the tree ______ full of food. A. a basket was B. was a basket C. are a basket D. were a basket

Combine sentences with “so...that”, “such...that” 1. The food was hot.It burned my tongue 2. He is fat.Everybody calls him stuffy 3. You speak very fast.I can’t catch up with you words 4. I had many friends .I never felt lonely 5 they worked very quickly. There was no time for talking 6 the film was very interesting . We went to see it twice 7 she had a sore throat.She could hardly speak 8 the children make a noise. We could hardly hear ourselves speak 9 We had had a tiring day. We went straight to bed. 10 He was a fool. No one took any notice of him 11 The room was in a mess. It took two hour to tidy Mọi người giúp em với ạ! Em cảm ơn nhiều ạ!

em cần gấp ....................

cho 9,2 gam hỗn hợp 2 kim loại gồm Fc và Mg tan hoàn toàn trong 200ml dung dịch H²SO² loãng dư thu được 5,6 lít khí (đktc) a. Tính khối lượng muối sunfat tạo thành sau phản ứng. b. Nồng độ mol dung dịch H²SO⁴ đã dùng

Viết bài văn nêu cảm nghĩ về BLACKPINK

Diện tích các nhóm đất chính ở nước ta (km2) Các bn giải hộ mk vs mik sẽ vote cho bn giải tốt nhất ạ Mk cảm ơn trc ♡

Word form 1 Is this one of the most ........ experiences of your life? (stress) 2 The region ......... over 50% of the country is wheat ( production) 3 One example of .......... in real life is cooking (conduct) 4 The tornado caused .............. damage to the city (extend) 5 People use the Internet for ........... (entertain) 6 ............ accounts for three-fourth of the income of newspapers (advertise) 7 There used to be a lot of ............. here (cry) 8 What .......... did you take part in a school? (act)

I got many hobbies, but I love reading most. Book is always a great friend to me. It’s a good method to improve my vocabs by exposing a lot of new words. By reading, I can get better at concentration because it can require me to pay attention on what I’m reading for a long period. It can also open up the knowledge door for all people. Reading book let me see the structure of the brain, share me about the world’s history, and bring me a new whole. I myself think that reading is one of the most interesting indoors activity Hãy đặt câu hỏi về bài nói T.A trên và trả lời giúp mình nha!!!

1. Beside the roadside__________. A. a horse stood B. does a horse stand C. did a horse stand D. stood a horse 2. Only after they send you an application ________. A. can you apply B. you can apply C. do you apply D. did you apply 3. At no time ______ greater opportunities. A. did women had B. has women had C. does women have D. have women had 4. Not once ______ into her eyes. A. he looked B. does he looked C. did he look D. looked he 5. On no account ______in the office be used for personal materials. A. the photocopy machines B. should the photocopy machines C. the photocopy machines should D. does the photocopy machines 6. Rarely _______ permission to return to homes contaminated during a toxic waste accident. A. is people given B. do people given C. people given D. are people given 7. In front of the gate ______ the guard. A. did B. does C. did stand D. stood 8. Only on rare occasions _______ to the theatre. A. do they go B. they went C. go they D. went they 9. Only once a day ______ home. A. does Mary leave B. left Mary C. Mary leaves D. will Mary left 10. On the island _______ the only presentation of the Indian’ handicraft. A. remains B. does it remain C. did it remain D. remain it 11. _______ an emergency arise, call 911. A. Can B. Does C. Should D. Will 12. _______ has the work been so easy. A. Never B. Only by C. when D. For 13. Little ______ what is in store for him. A. he knows B. does he know C. knows he D. knew he 14. _______ the reservoir, the ancient village couldn’t have been discovered. A. Had the drought not lowered B. If had the drought not lowered C. The drought had not lowered D. Not had the drought lowered 15. Up ______ when it saw its master. A. jumped the dog B. did the dog jump C. the dog jumped D. does the dog jump