Các bạn ơi, giúp mk vs ạ. Mk cảm ơn nha

Tam giác ABC cân tại A, đường cao AH. M thuộc AB, N thuộc tia đối của tia CA sao cho BM=CN. MN cắt BC tại I. Đường thẳng đi qua I vuông góc với MN, cắt AH tại O. CMR: AH.AO=AB^2

I.choose the word thay has the underlined part pronounced diferently from the others. 1. a.pottery b.flower c.silent d.service 2. a.girl b.expert c.open d.burn 3. a.sentence b.world c.picture d.dangerous 4. a.surfing b.collect c.concert d.melody 5. a.worst b.learn c.control d.dessert

4. He hardly ever makes a mistake, ? 5. We must communicate with you by means of email or chatting, ? 6. She has got a great sense of humor, ? 7. Neither of them offered to help you, ? 8. He ought to have made a note of it, ? 9. There will be plenty for everyone, ? 10. Let’s go out for dinner tonight, ?

Biện pháp tu từ trong đoạn thơ 'Chỉ có đại bàng vẫn ngồi im Lặng đẽ nhìn hàng cây trút lá Khi quê hương gặp những ngày băng giá Đại bàng không bỏ bay đi' Em cần gấp trước 9h

cho 2 lực f1=AB, f2=AD cùng tác động vào tại điểm M và vật đứng yên cho biết cường độ của f1 f2 đều là 50N và AMB=60° tìm cường độ và hướng của hợp lực f3.[ f3 = f1+f2 ]

Hộ mình với mn ơiiii mk cần gấp lắm

Tich 17x27x37x.......x2007 co tan cung la ch/s may

Giúp e với e cho 5 sao + lời giải hay luôn 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 _______ that he was leaving way that afternoon. A. told me B. told to me C. said me D. says to me 3. She said to me that she __________ to me the Sunday before. A. wrote B. has written C. was writing D. had writing 4. I _________ him to sell that old motorbike. A. said to B. suggested C. advised D. recommended 5. My parents reminded me ________ the flowers. A. remember to plant B. not to plant to plant C. to plant D. planting 6. I asked Martha ______ to enter law school. A. are you planning B. is she planning C. was she planning D. if she was planning 7. Nam wanted to know what time ________. A. does the movie begin B. did the movie begin C. the movie begins D. the movie began 8. I wondered_______ the right thing. A. whether I was doing B. if I am doing C. was I doing D. am I doing 9. The scientist said the earth ________ the sun. A. goes around B. is going around C. went around D. was going around 10. 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 11. They said that they had been driving through the desert__________. A. the previous day B. yesterday C. the last day D. Sunday previously 12. He asked the children _________too much noise. A. not to make B. not making C. don’t make D. if they don’t make 13. The man said that the days _________longer in summer. A. will be B. are C. were D. can be 14. The teacher said Columbus _________America in 1942. A. discovered B. had discovered C. was discovering D. would discover 15. John said he _________ her since they ________ school. A. hasn’t met – left B. hadn’t met – had left C. hadn’t met – left D. didn’t meet – has left 16. The woman asked __________get lunch at school. A. can the children B. whether the children could C. if the children can D. could the children 17. Laura said that when she_________ to school, she saw an accident. A. was walking B. has walked C. had been walking D. has been walking 18. He asked, “Why didn’t she take the final exam?” – He asked why __________ the final exam. A. she took B. did she take C. she hadn’t taken D. she had taken 19. Ba said he__________ some good marks last semester. A. gets B. got C. getting D. have got 20. They told their parents that they___________ their best to do the test. A. try B. will try C. are trying D. would try 21. She asked me where I___________ from. A. come B. coming C. to come D. came 22. She_________ me whether I liked classical music or not. A. ask B. asks C. asked D. asking 23. He asked me who____________ the editor of that book. A. was B. were C. is D. has been 24. He wants to know whether I ___________ back tomorrow. A. comeB. came C. will come D. would come 25. I wonder why he___________ love his family. A. doesn’t B. don’t C. didn’t D. hasn’t

Cho tập hợp C=[-1;3) tập hợp D=[1;7] giao của tập hợp C và D là tập hợp nào ?