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1. Bài 1. Người ta cần truyền một công suất điện 200kW từ nguồn điện có điện áp 5000V trên đường dây có điện trở tổng cộng 20 Ω. Tính độ giảm điện thế trên đường dây.

nguyên nhân thất bại của phong trào cần vương

Cho tam giác ABC cân tại A. Các đường thẳng vuông góc với AB, AC lần lượt tại B, C cắt nhau ở M. Chứng minh rằng: a) AM là tia phân giác của góc A. b) AM vuông BC

Tam giác ABC nội tiếp đường tròn (o). Có P, Q, R theo thứ tự là các điểm chính giữa các cung bị chắn BC, CA, AB bởi các góc A, B, C C/m AP vuông góc với QR Ai giúp mình với ạ

1. I suggest that you should ________ them about their plans. (A) say with (B) said (C) tell to (D) speak to 2. I know somebody ________ can play the guitar. (A) he (B) who (C) what (D) that he 3. Did you ask your father ________ some money? (A) – (B) after (C) on (D) for 4. Do you like Greek food? Yes, ________. (A) it's very well. (B) I like (C) is good (D) I do 5. You look ________ in red! (A) most nicely (B) too nice (C) nicely (D) very nice 6. We know their address, but they don't know ________. (A) ours (B) their's (C) our's (D) our 7. I’d rather be a millionaire. = ________ (A) I’ve been a millionaire. (B) I’d better be a millionaire. (C) I’d prefer to be a millionaire. (D) You have more millions than me. 8. Can you use ________ computer? (A) a (B) one (C) two (D) an 9. Under no circumstances ________ or exchanged. (A) good will be returned (B) goods should be returned (C) can good be returned (D) are goods being returned 10. Frank ________ when he noticed a large packing case lying on the floor (A) has about to leave (B) had about to leave (C) is about to leave (D) was about to leave 11. He ________ newspapers for ten years. (A) is selling (B) sells (C) has been selling (D) has been sold 12. This luggage is quite similar to ________. (A) that one (B) those (C) in additional (D) that 13. Margaret as well as Jane ________ here since last week. (A) has been (B) was (C) were (D) have been 14. The doctor showed the new nurse ________ to do. (A) what (B) that (C) how (D) as 15. Frede came to the meeting but Charles ________. (A) isn’t (B) hasn’t (C) didn’t (D) wasn’t 16. What does he ________ for a living. (A) make (B) does (C) do (D) makes 17. He was ________ of all his money. (A) stolen (B) robbed (C) removed (D) taken 18. The murderer was ________ yesterday. (A) hanging (B) hung (C) hanged (D) hang 19. Don’t let your brothers ________ the present. (A) to see (B) seeing (C) seen (D) see 20. No, thank you, I don’t ________ sugar in tea. (A) take (B) put (C) eat (D) drink 21. Who are all ________ people? (A) this (B) those (C) them (D) that 22. Claude is ________. (A) Frenchman (B) a French (C) a Frenchman (D) French man 23. he oranges are ________. (A) each one ten pence (B) ten pence the piece (C) each ten pence (D) ten pence each 24. – Are you ready? – ________. (A) Already not (B) Quite not (C) Yet not (D) Not quite 25. They are all ________ ready for the party. (A) getting (B) going (C) doing (D) putting 26. When do you go ________ bed? (A) to (B) to the (C) in (D) in the 27. I’d rather be a millionaire. = ________ (A) I’ve been a millionaire. (B) I’d better be a millionaire. (C) I’d prefer to be a millionaire. (D) You have more millions than me. 28. I think he ________ football now. (A) is playing (B) has played (C) plays (D) played 29. He took ________ cheese. (A) all of (B) all (C) the all (D) all of the 30. They ________ in Warsaw for about ten years. (A) live (B) lived (C) lives (D) have lived

So sánh tư tưởng “trọng dân” của Nho gia và tư tưởng dân chủ tại Hy Lạp cổ đại qua một số đại diện tiêu biểu (Solon, Pericles, Democritus).

Do các phân tử, nguyên tử của chất chuyển động hỗn độn không ngừng nên xảy ra hiện tượng A: bụi tung lên khi xe cộ chạy qua B: nước bay hơi từ ao, hồ C: gió thổi cuốn lá khô bay đi D: khói bay lên từ ống khói nhà máy

Em viết một bài không quá 1000 từ (theo thể bình luận, nêu cảm nghĩ, cảm tưởng...) của em về về Tổng đốc thành Hà Nội Nguyễn Tri Phương. GIÚP MÌNH VỚI !!!!!!

cho mình hỏi mình cần gấp lắm ạ cảm ơn