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Thaoa
2 năm trước
cmr h/s ĐB trên $[0;\frac{\pi}{2})$
Thích Trả lời Chia sẻ

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Câu 1:Khi hiệu điện thế đặt vào giữa hai đầu dây dẫn tăng hay giảm bao nhiêu lần thì cường độ dòng điện qua dây dẫn đó thay đổi như thế nào? A. Tăng hay giảm bấy nhiêu lần. B. Giảm hay tăng bấy nhiêu lần. C. Không thay đổi. D. Không thể xác định chính xác được. Câu 2: Một bóng đèn điện khi thắp sáng có điện trở 12ôm và cường độ dòng điện chạy qua dây tóc bóng đèn là 0,4A. Hiệu điện thế giữa hai đầu bóng đèn khi đó là: A. U = 30V. B. U = 6V. C. U = 4,8V. D. Một kết quả khác Câu 4: Nếu tăng hiệu điện thế hai đầu dây dẫn lên hai lần thì công suất tiêu thụ điện của dây dẫn sẽ: A. Không đổi. B. Tăng hai lần. C. Tăng ba lần. D. Tăng bốn lần. Câu 5: Số đếm của công tơ điện ở gia đình cho biết: A. Thời gian sử dụng điện của gia đình. B. Công suất điện mà gia đình sử dụng. C. Điện năng mà gia đình sử dụng. D. Số dụng cụ và thiết bị mà gia đình sử dụng. Câu 6: Một ấm điện có ghi 220V- 1000W được sử dụng với hiệu điện thế 220V trong 2 giờ. Điện năng mà ấm tiêu thụ là: A. 2000 J. B. 2000 kJ. C. 20 kWh. D. Một kết quả khác.

1. I don’t understand this sentence. What ............................? a. does mean this word b. have this word mean c. means this word d. does this word mean 2. Jonh ....................tennis once or twice a week. a. usually play b. is usually playing c. usually plays d. have usually played. 3. Nurses .................... after patients in hospitals. a. are looking b. look c. looks d. is looking 4. I usually .................. away at weekends. a. have gone b. goes c.am going d. go 5. The earth ..................round the sun. a. go b. has gone c. went d. goes 6. I come from Canada. Where .................you..................from? a. do.............come b. did ...... come c. are ..........coming d, have .....come 7. I ................ at 8 o’clock every morning. a. was getting up b. got up c. is getting up d. get up 8. .................... you go to dentist ? a. How often are b. How often do c. How often does d. How are 9. The sun ............... in the East. a. is rising b. rose c. has risen d. rises 10. It ‘s a nice day. I ............. we go out for a walk. a. suggested b. suggest c. is suggesting d. are suggesting 11. The swimming pool .............. at 9 o’clock and ............ at 18.30 everyday. a. opens............. closes b. opens ...... closed c. opened...... closed d. opened......... closes 12. Bad driving often ............... many accidents. a. caused b. caused c. causes d. has caused 13. The Olympic Games ............... every four years. a. take place b. takes place c. took place d. is taking place 14. What time ................ the banks close in Britain ? a. do b. did c. does d. can 15. Both viruses and genes ................ made from nucleoproteins. a. are b. is c. were d. has been 16. His knowledge of languages and international relations ................ him in his present work. a. aids b. aid c. have aided d. had aided 17. The books, an English dictionary and a chemistry text, .............. on the shelf yesterday. a. was b. were c. is d. are 18. Three swimmers, Paul, Ed, and Jim, ................ now in competition for medals. a. is b. has been c. had been d. are 19. Listen ! I .............. somebody knocking at the front door. a. am hearing b. heard c. have heard d. hear 20. She sometimes ...............vegetables at this market. a. is buying b. has bought c. buys d. will buy 21. That brown suitcase ................ to Dr. Smith . a. belongs b. has belonged c, is belonging d. belonged 22. We’ll go out when the rain ......................... a. stopped b. will stop c. stops d, had stopped 23. I …………for Christine. Do you know where she is? a. look b. looked c. am looking d. looks. 24. At 5 o’clock yesterday evening, I ……………my clothes. a. am ironing b. have ironed c. ironed d. was ironing. 25. Are you ready, Ann? Yes, I……………….. a. am coming b. come c. came d. have came. 26. I ………………..along the street when I suddenly heard footsteps behind me. a. was walking b. am walking c. walk d. walked. 27. She ………….German for two years. a. has learnt b. is learning c. learn d. learns. 28. When I last………..Jane, she ………..to find a job. a. see/was trying b. saw/was trying c. have seen/tried d. saw/tried. 29. Ann …………..tea very often. a. doesn’t drink b. don’t drink c. didn’t drink d. hasn’t drunken. 30. Look! That man………….to open the door of the car. a. try b. tried c. is trying d. has tried. 31. When I was young, I ………………to be a singer. a. have learnt b. am learning c. had learnt d. learnt. 32. I …………….lots about the job so far. a. have learnt b. am learning c. had learnt d. learnt. 33. They…………me about it last week. a. was telling b. told c. had told d. would tell 34. I hope everything…………..fine. a. is b. was c. would be d. will be 35. My grandfather………….many tears ago. a. had died b. has died c. died d. was dying 36. I………………my son the money for that last week. a. gave b. given c. have given d. was given 37. Where …………..you at 9:00 last night, Mr. Green? a. have been b. were c. will be d. are 38. Last year they ………….22 million TV sets. a. were selling b. had sold c. has sold d. sold 39. I think you…………….pay to park here. I ‘ll just go and read that notice. a. will b. would c. must d. better 40. Ted and Marry………………….for 24 years. a. have been married b. married c. were married d. has been married. 41. I think the weather…………………nice later. a. will be b. be c. is d. has been 42. We ………….a party last Sunday. It was great we invited lots of people. a. have b. have c. had. d. had had 43. I ……………..Peter yet. a. not have seen b. do not see c. have not seen d. was not seeing 44. My brother …………………me for weeks . a. hasn’t phoned b. didn’t phoned c. isn’t phoning d. not phoned 45. How…………..have you known each other? a. already b. for c, long d. since

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