Cho hai đường tròn (O) và (O') cắt nhau ở A và B, trong đó tiếp tuyến chung CD song song với cát tuyến chung EBF, C và E thuộc (O), D và F thuộc (O'), B nằm giữa E và F. Gọi M, N theo thứ tự là giao điểm của DA, CA với EF. Gọi I là giao điểm của EC và FD. Chứng minh rằng:a;CMR:tam giác ICD=tam giác BCD b;CM:IB là đường trung trực của MN
15. A great number of people are involved -------------- the use of English. A. in B. on C. at D. to 16. English is used -------------- an access to world scholarship and world trade. A. to B. for C. like D. as 17. There were a power failure and all the lights went --------------. A. up B. out C. after D. along 18. The police went -------------- the burglars. A. after B. over C. down D. up 19. We are going -------------- a few days for the holidays. A. away B. up C. on D. out 20. The dog wants to go -------------- towards the fire. A. away B. back C. after D. along 21. The prize of petrol is going -------------- because the cost of the exploitation is too high. A. down B. up C. along D. on 22. Go -------------- your work carefully before you hand it in. A. over B. up C. back D. into 23. As time goes -------------- my memory seems to get worse. A. down B. by C. out D. away 24. You should try to study hard to -------------- your classmates. A. make fun of B. keep pace with C. lose track of D. pay attention to 25. The man whom you -------------- on the bus yesterday is my father. A. took notice of B. made fuss over C. put a stop to D. made room for 26. He was very angry because they -------------- him. A. took account of B. set fire to C. made fun of D. lost touch with 27. The teacher made allowance -------------- his marks because his father was in hospital. A. up B. for C. to D. of 28. Write your name -------------- the top of the page. A. in B. at C. to D. with 29. Mozart was born in Salzburg -------------- 1756. A. at B. on C. in D. from 30. -------------- Saturday night I went to bed -------------- 11 o’clock. A. At/ on B. In/ at C. On/ at D. At/ to 31. These days everybody is aware -------------- the dangers of smoking. A. up b. of C. to D. with 32. Many young people want to be independent -------------- their parents nowadays. A. on B. up C. from D. of 33. Why are two schools so -------------- from each other. A. similar B. same C. different D. afraid 34. The child is very -------------- at arithmetic. A. quick B. prefect C. sad D. rich 35. Could I speak…… Tom, please?- I’m afraid Tom is ……work. Would you like to speak…….him ? A. up/at/to B. to/at/to C. with/in/with D. on/in/of 36. He started going……..school …….the age of five. So now he’s been………. school for ten years . He’s leaving………the end of this year. A. to/at/in/in B. to/with/on/out C. for/about/in/of D. off/up/upon/above 37. He goes….his office every day, except Sunday. On Sundays he stays ….home and works…..the garden. A. for/on/in B. to/up/with C. to/at/in D. for/at/under 38. I think I left my umbrella….. the bus . I’d better write ….. the lost property office. A. in/for B. at/to C. up/with D. on/to 39. We arrived …. the airport…… good time for the plane. A. in/for B. at/at C. up/about D. on/to 40. Can I look up a word …your dictionary? I left mine……. home.
Giúp em câu 1 trắc nghiệm và câu 14,15 tự luận Em cảm ơn nhiều ❤️❤️❤️
11,2l hỗn hợp X(H2 và C2H6) có tỷ khối so với Oxi là 0.4125.Trộn 11,2l hỗn hợp X với 20,16l khí 02 rồi tiến hành đốt hỗn hợp sau phản ứng kết thúc tiến hành làm lạnh sản phẩm thu được chất lỏng A và khí B a) Tính % về thể tích mỗi khí trong hỗn hợp X b) Tính khối lượng A c) Tính% về thể tích và % về khối lượng các khí có trong B
ai giúp mình sẽ đc mk vote 5* và câu trả lời hay nhất (trả lời hết mới đc nha) Chỉ cần làm câu 3 và câu 5 thôi
Khối lượng súng là 4kg và của đạn là 50g. Lúc thoát khỏi nòng súng, đạn có vận tốc 800m/s. Vận tốc giật lùi của súng là: A.6m/s B.7m/s C.10m/s D.12m/s GIẢI THÍCH NỮA NHÉ. THKS
Cưỡng chế người tham gia giao thông là làm gì?
1. …………we lived in town, we often went to the theater A. After B. When C. For D. Or 2. He took the food eagerly, …………he had eaten nothing since dawn. A. if B. in case C. but D. for 3. …………the sun rose, the fog dispersed. A. As B. When C. Before D. After 4. …………a married man, he has to think of his family. A. If B. As C. or D. so 5. Tired…………he was, he offered to carry her. A. as B. though C. Although D. however 6. Some people waste food…………others don't have enough. A. as B. in case C. while D. before 7. …………she came to know him better, she relied on him more. A. While B. Because of C. Though D. As 8. …………I sympathize with your point of view, I cannot accept it. A. While B. Although C. But D. A or B 9. How can you expect your children to be truthful…………you yourself tell lies? A. when B. therefore C. because D. since 10. Strong…………he was, he couldn't lift it. A. like B. as C. or D. and 11. He stole, not…………he wanted the money, …………because he liked stealing. A. for/ but B. because/but C. although/however D. because/and 12. Not everybody thinks the building is ugly…………, some people say it looks marvelous. A. On the contrary B. Because C. Although D. Since 13. Business has been very bad this year…………, we have had to close one of our factories. A. consequently B. as a result C. but D. A or B 14. Take a map with you …………you lose your way. A. if B. in case C. so that D. so 15. The play was very boring, …………they walked out. A. so B. if C. when D. while 16. She'll only do the job…………you pay he more. A. unless B. after C. if D. as 17. He hasn't written to us…………he left. A. when B. for C. because D. since 18. I never take and umbrella…………it's raining heavily. A. unless B. if C. otherwise D. or 19. He got a new alarm clock…………he'd get up on time. A. because B. and C. so that D. so 20. He agreed to go climbing…………he hated heights. A. despite B. in spite of C. so D. although
Tui cần những người giỏi Toán giúp với.........( hứa tik 5 sao + cảm ơn + tik hay nhất cho ai làm được hết bài này )
Tìm các giá trị nguyên không âm của x thỏa mãn BPT: x+3/x^2-4 - 1/x+2 < 2x/2х-х^2 giải hộ em bài này với ạ !
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