Mọi người giúp em vs Em vote 5* cho ạ

Câu 2: (1,5đ) Máy thứ nhất sinh ra 1 công 225 kJ trong 1 phút. Máy thứ hai sinh ra 1 công 4500 kJ trong nửa giờ. Máy nào có công suất lớn hơn và lớn hơn bao nhiêu lần? Câu 3 : (3đ) Một đầu máy xe lửa có công suất là 1104 kW kéo một đoàn tàu chuyển động đều. Tính : a) Thời gian chuyển động của đoàn tàu. Biết công thực hiện trong thời gian đó là 88320 kJ. b) Lực kéo của đầu máy. Biết tốc độ của đoàn tàu là 54km/h giải hộ mình với

Tam giác cân có hai cạnh là 10dm và 23dm. Độ dài cạnh thứ 3 của tam giác là: dm

Cho ΔDEF , gọi I là trung điểm của EF. Kẻ EH vuông góc với DI tại H, kẻ FK vuông góc với DI tại K. a) Chứng minh: IH = IK b) Chứng minh: DE + DF > DH + DK c) Chứng minh: DE + DF > 2DI.

hai bên bờ sông những bãi ngô bắt đầu xanh tốt. điền dấu phẩy

16. There are 35 students in my class. A. How much students are there in your class? B. How many students are there in you class? C. How many student are there in your class? D. How many students are there in your class? 17. My brother is studying in his bedroom. A. What is her brother doing in his bedroom? B. What are their brother doing his bedroom? C. What are your brother doing in his bedroom? D. What is your brother doing in his bedroom? 18. What is her favourite programme? A. What programme do you like best? B. What programme is she like best? C. What programme does she like best? D. What programme is he like best? 19. I enjoy watching TV. A. I am interested in watching TV. B. I am interested to watching TV. C. I am interested into watch TV. D. I am interesting of watching TV. 20. What is your address? A. Where does she live? B. Where do they live? C. Where do you live? D. Where does he live?

Giải giúp mình bài 8 với mọi người:< pls

11. You can _________ a remote control to change the channel from a distance. A. use B. uses C. using D. to use 12. _________ she __________ a game show after 11o’clock? A. Does – watch B. Do – watch C. Are – watch D. Is – watch 13. What does he __________ through game shows? A. learning B. learns C. learn D. to learn 14. What time _______they _________ sport events? A. does - watch B. are- watch C. do – watch D. is - watch 15. They always _________ hard every day to produce quality programmes for TV. A. works B. working C. to work D. work

Choose the best answer to fill in the blank. 23. If I have a terrible headache, I ________ some medicines. A. will take B. take C. would take D. can take 24. ________ you count from one to ten when you________ two? A. Could/were B. Would/ were C. Could/ are D. Can/ are 25. Is there any________ in the bin?- Yes, there are some. A. cups B. spoons C. rubbish D. plates 26. If people use________ paper, they can save a lot of trees. A. less B. more C. much D. fewer 27. If he________ much time, he will watch TV more. A. having B. have C. has D. had 28. If there is wastepaper bin in each class, the class will be________ . A. cleaner B. dirtier C. lighter D. darker 29. There are many ways to________ pollution. A. increase B. reduce C. clear D. protect 30. I might buy a smart phone________ the Internet. A. to surf B. surf C. surfing D. surfed 31. ________ happens when water in lakes, rivers and oceans is polluted. A. Water pollution B. Air pollution C. Food pollution D. Soil pollution 32. I________ a new cat since yesterday. A. have bought B. bought C. will buy D. have buy 33. A robot won't be able to________ of babies. A. take B. take care C. care D. take note 34. High buildings are also called________ . A. high house B. tall office C. skyscrapers D. tall houses 35. You can take these plastic bottles to the factory to________ them. A. reduce B. reuse C. recycle D. redo 36. If you have a smart watch, you can________ your friends in other countries. A. say B. contact C. talk D. speak 37. Things you throw away because you don't need them are called________ . A. environment B. rubbish C. papers D. bin 38. If we protect our environment, we will________ . A. buy our world B. save our world C. damage our world D. destroy our world 39. Robots will be able to work harder and longer than people ________ getting tired and complaining. A. so B. with C. but D. without 40. We can save a lot of________ if we remember to turn off all the electric appliances when we go out. A. electric B. electrical C. electrician D. electricity 41. Have you ever________ on a spaceship on the Moon? A. travelled B. travelling C. travel D. to travel

6. _________ do you like the modern English programme? - Because it helps me improve my English. A. What B. Where C. Who D. Why 7. Find the word which has a different sound in the part underlined: A. brother B. through C. then D. weather 8. _________ hours do you watch TV a day? – About two or more. A. How many B. How often C. How far D. How old 9. _________ are films by pictures, not real people and often for children. A. Documentary B. Cartoons C. Love stories D. Detective story 10.________ are the children? They are playing in the front yard. A. What B. Where C. Which D. Why