làm hộ miLàm hộ mị với pls nhanh hộ!!!! (

Cho hình chóp sabcd có đáy hình vuông, cạnh đáy = a. SA vuông góc (ABCD), sa=2a. M,N là hình chiếu của A lên SB,SD a. Tính d (O,(AMN))

Viết 1 bài văn Nêu cảm nhận của em về đoạn trích Chí khí ANh Hùng

Every year many people in the world learn English. Some of them are young children. (17) _______ are teenagers. Many are adults. Some learn at school, and some learn in evening classes. A few learn English by (18) _______ or just by (19) _______ to the language on television or among their friends. Most people must work hard to learn English. (20) _______ do all these people want to learn English? It is difficult to answer that question. Young children learn English at school to study better at their subject. Many adults learn English because (21)______ of their useful for their work. Teenagers often learn English for their (22) ______ studies, because some of their books are written (23) ______ English at college and university. Other people learn English because they want to read English newspapers or magazines for (24) ______ and entertainment. 17. A. The others B. Others C. Another D. Each other 18. A. them B. their C. themselves D. theirs 19. A. listening B. speaking C. talking D. hearing 20. A. What B. How C. Why D. Where 21. A. they are B. it is C. there is D. of being 22. A. taller B. higher C. better D. fuller 23. A. in B. at C. by D. with 24. A. equipment B. example C. transportation D. information

nêu sự tương tác giữa 2 vật nhiễm điện

1. They say that many people are homeless after the tsunami. A. They say many people to have been homeless after the tsunami. B. They say many people to be homeless after the tsunami. C. Many people are said to have been homeless after the tsunami. D. Many people are said to be homeless after the tsunami. 2. They know that the Prime Minister is in favour of the new law. A. The Prime Minister is known to have been in favour of the new law. B. They know the Prime Minister to be in favour of the new law. C. The Prime Minister is known to be in favour of the new law. D. They know the Prime Minister to have been in favour of the new law. 3. They expect that the government will lose the election. A. The government is expected to have lost the election. B. The government is expected to lose the election. C. They expect the government to lose the election. D. They expect the government have lost election. 4. They think that the prisoner escaped by climbing over the wall. A. The prisoner is thought to escape by climbing over the wall. B. The prisoner is thought escaped by climbing over the wall. C. The prisoner is thought having escaped by climbing over the wall. D. The prisoner is thought to have escaped by climbing over the wall. 5. They believe that the thieves got in through the kitchen window. A. The thieves are believed to have got in through the kitchen window. B. The thieves are believed to get in through the kitchen window. C. They believe the thieves got in through the kitchen window. D. They believe the thieves have got in through the kitchen window. 6. They report that over 200,000 people were killed in the tsunami. A. Over 200,000 people are reported to have been killed in the tsunami. B. Over 200,000 people are reported to be killed in the tsunami. C. Over 200,000 people are reported to have killed in the tsunami. D. Over 200,000 people are reported to kill in the tsunami. 7. They say that three men were arrested after the explosion. A. Three men are said to be arrested after the explosion. B. Three men are said to have been arrested after the explosion. C. Three mend are said to have arrested after the explosion. D. Three men are said to arrest after the explosion. 8. The letter that I received yesterday is from my sister. A. I was received that the letter is from my sister. B. The letter that was received yesterday is from my sister. C. The letter yesterday that is from my sister is received by me. D. I received yesterday that the letter is from my sister. 9. People say that he is the most experienced teacher of English. A. He is said to be the most experienced teacher of English. B. He is said the most experienced teacher of English. C. He is to be said the most experienced teacher of English. D. That he is the most experienced teacher of English is said by people. 10. Nobody told me that George was ill. A. I was told that. B. I wasn't told that George was ill. C. George wasn't told to be it. D. George was told not to be ill

Question 16: Lan is very tired. ________, she has to finish her assignment before going to bed. * 1 điểm A. Although B. So C. Therefore D. However

Giúp mình nhanh vs ạ,mình đg cần gấp

Ghi tên các nguyên tố hóa học sau: He, B, C, N, O, F ,Ne, AI, Si,P,S, Cl, Ar, Ga, Ge, As, Se, Br, Kr, In,Sn,Sb, Te,I, Xe, Tl, Pb, Bi, Po, At,Rn Vd: H: hidro

Nang suat lao dong tang 25%.Hoi khi hoan thanh san pham thi thoi gian se giam bao nhieu?