Cho tam giác ABC có AB = AC, M, N lần lượt là trung điểm của AC, AB. a) Chứng minh: tam giác ACN =tam giácABM . b) Trên tia đối của tia MB lấy điểm E sao cho M là trung điểm của BE, trên tia đối của tia NC lấy điểm F sao cho N là trung điểm của CF. Chứng minh: A là trung điểm của EF. c) Chứng minh: MN song song với BC và EF.

Write the questions: (2ms) 1/ My sister feels hungry and tired. ………………………………………………. 2/ Her eyes are blue. ………………………………………………. 3/ This bar of soap is 12.000 dong. …………………………………………… 4/ I’d like some apple juice. ………………………………………………

Một người đi một quãng đường trong ba ngày. Ngày thứ nhất đi được ½ quãng đường, ngày thứ hai đi được ⅓ quãng đường. Hỏi ngày thứ ba người đó đi được bao nhiêu phần quãng đường?

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Tác dụng hoá học của dòng điện biểu hiện qua. Chọn câu đúng? A. Giải phóng đồng ở cực âm của nguồn điện. B. Khi bóng đèn phát ra ánh sáng. C. Giải phóng đồng ở thỏi than nối cực âm nguồn điện. D. Giải phóng đồng ở thỏi than nối hai cực nguồn điện. E. Giải phóng đồng ở thỏi than nối cực dương nguồn điện.

một vé xem phim có giá 60000đ. khi có đợt giảm giá mỗi ngày ng xem giảm giá mỗi này lượt ng xem tăng 50%. do đó doanh thu tăng 25%. Hỏi giá vé đã giảm nhiêu so vs giá ban đầu. Giúp vs ạ.

Khi ta sao điện thoại hay sac bình ắc qui thì dong điện khi đó gây ra tác dụng

Bài 4. Lập đề toán theo tóm tắt , rồi giải bài toán đó Tóm tắt 5 hộp 365 quả trứng 3 hộp quả trứng

viết môt đoạn văn ngắn khoang 15 dòng trinh bày suy nghỉ của em về những bài học được rút ra từ hình tượng từ hải trong chí khi anh hùng

1. "Those eggs of different colors are very artistic". "Yes, they_____ in Russia". * 1 điểm a. were painted b. were paint c. were painting d. painted 2. "The people don’t remove the chairs from the ballroom". "Don't worry. They _____ them before the dance begins". 1 điểm a. will have been moved b. will move c. were moved d. moved 3. I wanted_____ by the head of the company, but it was impossible. 1 điểm a. to see b. to be seen c. seeing d. being to see 4. Katherine_____ at Bob's house every night. 1 điểm a. eats b. has eating c. is being eating d. has been eating 5. "Where did you get these old dresses?". "We_____ them in the old trunk". 1 điểm a. were found b. finding c. found d. have been found 6. People warned us not to go out alone. 1 điểm a. We were warned not going out alone b. We were warned to go out alone by people. c. We weren't warned to go out alone. d. We were warned not to go out alone. 7. Somebody is using the computer at the moment. 1 điểm a. The computer is being used at the moment. b. The computer at the moment is being used. c. The computer is being use by some body at the moment. d. The computer is used at the moment. 8. I didn't realize that somebody was recording our conversation. 1 điểm a. I didn’t realize that our conversation was recorded. b. I didn't realize that our conversation was being recorded c. I didn't realize that our conversation was being recorded by someone. d. Our conversation wasn't realized to be recorded. 9. We found that they had cancelled the game. 1 điểm a. We found that the game had been cancelled. b. The game had been cancelled. c. We found that the game hadn't been cancelled by them. d. The game were found to be cancelled. 10. They are building a new highway around the city. 1 điểm a. A new highway is being built around the city. b. A new highway is being build around the city by them c. A new highway around the city is being built. d. Around the city a new highway is being built. 11. They have built a new hospital near the airport. 1 điểm a. A new hospital has been built near the airport by they. b. A new hospital near the airport has been built. c. A new hospital has been built near the airport. d. Near the airport a new hospital has been. 12. People should send their complaints to the head office. 1 điểm a. Complaints should be sent to the head office. b. Complaints should be sent to the head office by people. c. Their complaints should be send to the head office by people. d. Their complaints to the head office should be sent. 13. They had to postpone the meeting because of corona virus. 1 điểm a. The meeting had to be postponed because of corona virus. b. The meeting had to because of corona virus be postponed. c. The meeting had to be postpone by them because of corona virus. d. The meeting because of corona virus had to be postponed. 14. The old man treated the little boy badly. 1 điểm a. The little boy was treated by the old man badly. b. The little boy was badly treat by the old man. c. The little boy badly was treated by the old man. d. The little boy was treated badly by the old man. 15. How do people learn languages? 1 điểm a. How are languages learned? b. How are languages learn by people? c. How languages are learned? d. Languages are learned how? 16. They didn’t offer Ann the job. 1 điểm a. The job wasn't offered Ann by them. b. Ann wasn't offered them the job. c. Ann wasn't offered the job them. d. Ann wasn't offered the job. 17. They will ask you a lot of questions at the interview. 1 điểm a. You will be asked a lot of questions at the interview. b. You will asked a lot of questions at the interview by them. a. A lot of questions will be asked you at the interview. d. A lot of questions will be asked at the interview. 18. The bill includes service 1 điểm a. Service is included by the bill b. Service included in the bill c. Service is included in the bill d. Service is in the bill 19. They have changed the date of the meeting 1 điểm a. The date of the meeting has been changed b. The date of the meeting has been change by them c. The meeting has been changed the date d. The date of the meeting ahs changed 20. Nobody told me that George was ill. 1 điểm a. I was told that George was ill 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