Một mảnh vườn hình thang có tổng số đo 2 đáy là 420m, chiều cao bằng 4/7 tổng số đo 2 đáy. a) Tính diện tích mảnh vườn đó? b) Người ta sử dụng diện tích mảnh vườn đó để trồng cam. Biết rằng 0,9m^2 thì trồng được 15 cây cam. Tính số cây cam trồng trên mảnh vườn đó.

16. I am very strong. I can lift this box alone. ................................................................................................................................... 17. She is very intelligent. She can get the first price in this exam. ............................................................................................................................... 18. The ladder is very long. It can reach the window. ............................................................................................................................. 19. The fire is very hot. It will boil the kettle. .............................................................................................................................. 20. It was very hot. We can go swimming this afternoon. ............................................................................................................................ 21. Nam was very experienced. He could finish that work for an hour. ........................................................................................................................... 22. Lan is old. She can go to school by herself. ......................................................................................................................... 23. Ba is tall. He can play volleyball. ........................................................................................................................ 24. Mai is intelligent. She can do that test. ....................................................................................................................... 25. They are very rich. They can buy a new car. ....................................................................................................................... 26. Tam is old. He can ride a motorbike. ......................................................................................................................... 27. Nam is very strong. He can carry those heavy bags. ...................................................................................................................... 28. The children are tired. They go to bed early. ....................................................................................................................... 29. Mr. Hung is hungry. He eats three loaves of bread. .................................................................................................................... 30. We are thirsty. We can drink a lot of water. ......................................................................................................................... 31. Minh and Lan aren’t tall. They can’t play basketball. ........................................................................................................................

Khi làm lạnh vật rắn thì khối lượng riêng ,khối luọng ,thể tích thay đổi như thế nào??

Một động cơ công suất 360W, nâng thùng hàng 180kg chuyển động thẳng đều lên độ cao 12m. Hỏi phải mất thời gian bao lâu? Lấy g = 10 m/s 2 . A. 60s B. 45s C. 30s D. 52s

Biết tổng số tiền trong đơn hàng là 2068000, trong đó đã có 10% thuế, hỏi giá của món hàng khi chưa có thuế là bao nhiêu? Có bạn giải: x=x.10%=2068000 ; x = 1880000 Diễn giải cụ thể hơn chút Giúp mình nhé,cảm ơn nhiều!

Tìm số nguyên x, biết: 3x-(-17)=20

chon từ thích hợp điền chỗ trống a.có một quả cầu ko thả lọt vòng kim loại,muốn quả cầu lọt ta phải............vòng kim loại để nó .....,hoặc ta phải .........quả cầu để nó............. b.khi đun nóng.............quả cầu tăng lên ,ngược lại.......của nó sẽ...........khi........... c.chất rắn .............khi nóng lên,co lại khi.......... d.khi rót nước nóng vào ly thủy tinh dày ,.............. tăng lên đột ngột làm thủy tinh.........đột ngột ko đồng đều,kết quả là ly thủy tinh bị nứt e.các chất rắn khác nhau thì.............khác nhau

Trình bày vai trò hệ tiêu hóa hệ hô hấp và hệ bài tiết trong sự trao đổi chất giữa cơ thể và môi trường ngoài

Lm giúp e bài 1 với bài 3 ik ạ

NIT 9 & UNIT 10 TIẾNG ANH LỚP 10 Pronunciation : 1. A. description B. tradition C. question D. expression 2. A. depth B. refer C. beneath D. secret 3. A. destroyed B. depressed C. filled D. answered Main stress 4. A. destruction B. industry C. addition D. electric 5. A. against B. conserve C. frequent D. remove Mark your answer to show the underlined part that needs correcting 6. Because of his mother has been seriously ill, she can’t come to the party. A. Because of B. has been C. seriously ill D. can’t come 7. I'll pay you double if you get the work finishing by Friday. A. I'll pay B. double C. if D. finishing 8. It often takes the boy about ten minutes to go to school from here by foot A. takes B. ten minutes C. to school D. by foot Choose the one or phrase that best completes each sentence. 9/ What do I think of your purple shoes? Well, they're certainly _______. A. differ B. difference C. different D. differently 10/ This has been a _______ time for us all. A. challenge B. challenger C. challenged D. challenging 11/ Scientists now send submarines to the seabed. A. investigate B. investigative C. investigation D. investigating 12/ I need someone _______ to look after the children while I'm at work. A. depend B. dependence C. dependable D. dependant 13/ These sperm whales to the warm waters to give birth . A. settle B. goes C. relocate D. migrate 14/ They knew there must be trouble unless the report was by the next day. A. finish B. finishes C. finishing D. finished 15/ You _______ show this letter to anyone else. A. mustn't B. didn’t have to C. couldn’t D. didn’t need 16/ I wouldn't work for them even if they _______ me twice my current salary. A. paid B. had paid C. have paid D. pay 17/ If anyone _______ for me, please tell them I'll be back in the office at 4 o'clock. A. rang B. had rung C. rings D. has rung 18/ Many people are very concerned about the _______ of the rainforests. A. lost B. loss C. lose D. losing 19/ When preparing meals, you need to think about _______ and taste as well as nutritional value. A. variety B. various C. varied D. variable 20/ Some marine animals are dangerous to humans. A. living in the mountain B. living in the ocean C. living in the forest D. living in the house 21/ Sperm whales and sharks are carnivores. A. animals that live in the sea B. animals that only eat plants C. fish that aren't born from eggs D. animals that eat meat 22/ Zoos nowadays are very about their image. A. sense B. sensitive C. sensible D. senseless 23/ A novelist is a person who has a very mind. A. image B. imagine C. imaginative D. imagination 24/ Most of the old part of the city was _______ by bombs during the war. A. planted B. destroyed C. eliminated D. worried 25/ We would never know the true of the loss of forest. A. interest B. value C. conserve D. cost 26/ The floor was covered in tiny pieces of paper. A. unimportant B. many C. very large D. extremely small 27/ He put an arm around her shoulder _______. A. protected B. protection C. protective D. protectively