cho hình chóp S.ABCD có đáy ABCD là hình vuông tâm O . M là trung điểm CD.Biết SA=SB=SC=SD=a căn 2, đường tròn ngoại tiếp ABCD có bán kính bằng a. gọi α là góc giữa SM và mặt đáy.khi đó tanα =?

Giải giúm em với mọi người ơi 😋

Giải phương trình tích này giúp em x(5+x)=0

bài tập về liên từ,mn giúp em vs ạ❤❤❤

giúp mình với ạ. cần gấp ạ unit interface uses crt; function diện tích hình vuông(hv), hình tròn(ht) hình thang(HTH) hình chữ nhật(HCN) chu vi các hình trên; implementation đề là:viết phương trình có sử dụng các hàm trong unit vừa tạo

giới thiệu đôi nét về vua Hàm Nghi và Tôn Thất Thuyết

1. He couldn't swim,________________ ? A. could him B.could he 2. Nobody cheated in the exam ___ ? A. did they B.didn't they 3. You have seen this film, ? A. haven't you B.have you 4. These books aren’t yours, ____? a. are these b. aren’t these c. are they d. aren’t they 5. Let's have a drink, ___ ? A. Shall we B. do we 6. He can speak three languages, ? A. can he B.can't he 7. I think he is a good teacher,____ ? A. don't I B.do I 8. It's windy today, ? A. aren't they B.isn't it 9. You wanted that, _________________? A. do you B.didn 't you 10. He saw that, ____________________________? A. isn't he B.won't he C. didn 't he D.doesn't he 11. You know that's right, _________________________? A. would you B.wouldn't you C. don 't you D.didn't you 12. Let’s go together, ? A. will you B.shall you C. shall we 13. Jim was your neighbor, ________? A. was he B. didn't you C.wasn't he 14. You were late today, ________? A. weren’t you B. wasn’t you 15. No one is better at English than Lan, ________? A. is she B. isn’t she C. are they D. aren’t they 16. There are a lot of people attending the wedding party, ________? A. are they B. are there C. aren’t they D. aren’t there 17. He seldom goes to the park, ________? A. doesn’t he B. is he C. does he D. isn’t he 18. Let’s go for walk, ________? A. will we B. shall we C. don’t you D. do you 19. I think he will come here, ________? A. doesn’t he B. won’t he C. will he D. don’t I 20.. The film is boring, ________? A. is it B. are they C. isn’t it D. aren’t they 21. You are listening to music, ________? A. is you B. are you C. aren’t you D. were you 22. You have a ticket to the game, _____? a. do you b. haven’t you c. don’t you d. have you 23.. You don’t know her, ________? A.do you B.don’t you C.are you D. aren’t you 24.. Ngan speaks English very well, ________? A.does she B.doesn’t she C.is she D. was she 25. John has bought a dictionary, ________? A.does he B. did he C. has he D. hasn’t he 26. They are going to do the test tomorrow, ________? A.do they B. are they C. aren’t they D. did they 27. I’m short, ________? A.am not I B. aren’t you C. are you D. aren’t I 28. No one is in this room now, ________? A.is one B. isn’t one C. is he D. are they 29. Do it right now, ______? A. will you B. shall you C. do you D. don’t you 30. There are no easy ways to learn a foreign language, _______? A. are they B. are there C. aren’t they D. aren’t there 31. You’ve never been in Italy, _____? a. haven’t you b. have you c. been you d. had you 32. Let’s go for a long walk, ______? A. will we B. shall we C .don’t you D. do you 33. I think he will join us, _____? A. doesn’t he B. won’t he C. will he D. don’t I 34. The film is good, _______________? A. is it B. are they C. isn’t it D. aren’t they 35. You are going to the party, ____________? A. is you B. are you C. aren’t you D. were you 36. They invited him to the party, ___________? A. do they B. don’t they C. did they D. didn’t they 37. Don’t leave anything behind, ______? A. do you B. don’t you C. will you D. shall we 38. Nobody likes the play, __________? A. do they B. don’t they C. didn’t they D. did they 39. The children can read English, __________? A. can’t they B. can they C. they can D. they can’t 40. That was Linh on the phone, ______? A. was it B. was that C. wasn’t that D. wasn’t it

Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions. Question 1: A. future B. mature C. pasture D. nature Question 2: A. explained B. prepared C. disappointed D. interviewed

cho mình hỏi giao điểm là gì ạ và cách nhận biết giao điểm ạ cảm ơn nhiều ạ xong mình vote 5 sao giúp mình với

Nêu những nét khái quát về tác giả tác phẩm của bài thơ đêm nay bác ko nghủ em cần gấp ạ cảm ơn