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Cho hình vuông ABCD có cạnh bằng a . Gọi O là giao điểm của đường chéo AC và BD . Trên đoạn thẳng AB và OC lần lượt lấy các điểm E và F sao cho AE =OF×căn2. A. Chứng minh tam giác DEF vuông cân. B. Giả sử AE= 2EB . Tính diện tích của tam giác DEF theo a .

Viết đoạn văn từ 6 đến 8 câu trình bày suy nghĩ của em sau khi bước sang học kỳ 2 trong đó có sỉ dụng 2 phó từ chỉ ra các phó từ đó

vẽ chibi 1 trong 12 cung hoàn dạo nhá !!!!

Viết đoạn văn viết về trường lớp xanh sạch đẹp = tiếng anh ( Hơi dài xíu nha ) Ko hay = báo cáo

Giúp mình câu s, câu r phần +vô cực, câu q phần + vô cực

7. Have they tested all the machines? A. Have all the machines be tested? B. Have all the machines been testing? C. Have all the machines been tested? D, Have all the machines been being testing? 8. Does he realize that they are laughing at him? 19. It is beli A. Is he realized that he is laughing at? B. Is he realized that he is being laughed a12 A. The mar C. The mas C. Does he realize that he is laughing at? D. Does he realize that he is being laughed at2 9. The manager offers me several jobs. 20. It was A. The b A. I was offers several jobs. B. I am offered several jobs. C. The b C. Several jobs are offered to me. D. B and C are correct. 10. We found that they had cancelled the soccer match. Exercise 1. A. We found that the soccer match had been cancelled, B. The soccer match had been cancelled. 2. 3. C. The soccer match was found that had been cancelled. 4. D. The soccer match was found to have been cancelled by us. 5n 11. Mary is cutting a cake with a sharp knife. A. A cake is being cut with a sharp knife by Mary. B. A sharp knife is cutting a cake and Mary. C. Mary and a sharp knife are cutting a cake. 12. "Did Shakespeare write this play?" D. Mary is cutting a sharp knife by a cake. A. Did this play be written by Shakespeare? C. This play was written by Shakespeare. B. Was this play written by Shakespeare? D. Did this play Shakespeare write? 13. Which book do the students love? A. Which book are done love by the students? B. Which book is the students loved? C. Which book are loved by the students? D. Which book is loved by the students? 14. How many slums are they going to clear? A. How many slums are being gone to clear? B. How many slums are being cleared? D. How many slums are going to be cleared? C. How many slums are going to clear? 15. Who wrote the report on the air pollution? A. By whom was the report on the air pollution written? B. Whom was the report written on the air pollution by? C. By whom was the report written on the air pollution? D. All are correct. 16. Who killed President John Kennedy? A. By whom President John Kennedy was Killed? B. By whom was President John Kennedy Killed C. By whom was killed President John Kennedy? D. By whom killed President John Kennedy) 17. How many students are carrying the bookshelf? A. By how many students are the bookshelf being carried? B. By how many students is the bookshelf being carried? C. By how many students is the bookshelf been carrying? D. By how many students are the bookshelf be carrying? Ai giải hộ bài này cho e vs ạ e đg cần gấp lắm ạ

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1. Nêu các hình thức di chuyển của ĐV? Lấy VD cho mỗi hình thức 2. Trình bày sự tiến hóa của hệ tiêu hóa các lớp ĐV đã học

Tìm x thuộc Z để (x+5).(x mũ 2+1)<0