cho hình thang cân ABCD AB=12cm , CD = 18cm, ADC=BCD=60 độ , tính bán kính đường tròn nội tiếp hình thang này Giups mik với nha mình đang cần gấp ak

Cho (O;R) H thuộc AB Qua H kẻ dây CD vuoog góc với AB ,E thuộc cung nhỏ CB .Tiếp tuyến tại E của (O) cắt DC tại Q ,AE cắt CD tại M. CMR HMEB nội tiếp

16. Some film stars_________ difficult to work with. A. are said be B. are said to be C. say to be D. said to be 17. Why did Tom keep making jokes about me? – I don’t enjoy_________ at. A. be laughed B. to be laughed C. laughing D. being laughed 18. Today, many serious childhood diseases_________ by early immunization.[ sự miễn dịch] A. are preventing B. can prevent C. prevent D. can be prevented 19. Do you get your heating_________ every year? A. checking B. check C. be checked D. checked 20. Bicycles_________ in the driveway. A. must not leave B. must not be leaving C. must not be left D. must not have left 21. Beethoven’s Fifth Symphony_________ next weekend.[ Symphony: khúc giao hưởng] A. is going to be performed B. has been performed C. will be performing D. will have perform 22. All bottles_________ before transportation. A. frozen B. were froze C. were frozen D. are froze 23. ___________________________.yet? A. Have the letters been typed B. Have been the letters typed C. Have the letters typed D. Had the letters typed 24. English has become a second language in countries like India, Nigeria or Singapore where `_________ for administration, broadcasting and education. A. is used B. it is used C. used D. being used 25. The telephones_________ by Alexander Graham Bell. A. is invented B. is inventing C. invented D. was invented 26. Lots of houses_________ by the earthquake. A. are destroying B. destroyed C. were destroyed D. is destroyed 27. Gold_________ in California in the 19th century. A. was discovered B. has been discovered C. was discover D. they discover 28. The preparation_________ by the time the guest_________ A. had been finished- arrived B. have finished- arrived C. had finished-were arriving D. have been finished- were arrived 29. The boy_________ by the teacher yesterday. A. punish B. punished C. punishing D. was punished 30. “Ms Jones, please type those letters before noon”_ “They’ve already ______, sir. They’re on your desk.” A. typed B. been being typed C. being typed D. been typed 31. Sarah is wearing a blouse. It___________ of cotton. A. be made B. are made C. is made D. made 32. They had a boy _________ that yesterday. A. done B. to do C. did D. do 33. We got our mail _________ yesterday. A. been delivered B. delivered C. delivering D. to deliver 34. James……..the news as soon as possible. A. should tell B. should be told C. should told D. should be telled 35. My wedding ring _________ yellow and white gold. A. is made B. is making C. made D. make 36. Mr. Wilson is _________ as Willie to his friend. A. known B. knew C. is known D. know 37. References _________ in the examination room. A. not are used B. is not used C. didn’t used D. are not used 38. Laura _________ in Boston. A. are born B. were born C. was born D. born 39. His car needs _________ A. be fixed B. fixing C. to be fixing D. fixed 40. Her watch needs _________. A. repair B. to be repaired C. repaired D. to repair 41. This house is going _________by my mother A. sold B. sell C. to be sold D. to sell 42. There’s somebody behind us. I think we are _________. A. being followed B. are followed C. follow D. following 43. Have you _________ by a dog? A. bite B. bit C. ever been bitten D. ever been bit 44. The room is being _________ at the moment. A. was cleaned B. cleaned C. cleaning D. clean 45. It _________ that the strike will end soon. A. is expected B. expected C. are expected D. was expected 46. It is _________ that many people are homeless after the floods. A. was reported B. reports C. reported D. reporting 47. He was said _________ this building. A. designing B. to have designed C. to design D. designed 48. Those letters _________ now. You can do the typing later. A. need typing B. needn't to typed C. need to type D. needn't typing 49. Over 1500 new houses _________ each year. Last year, 1720 new houses _________. A. were built/ were built B. are built/ were built C. are building / were built D. were built/ were being built 50. The new computer system _________ next month. A. is be installed B. is being installed C. is been installed D. are being installed by people

Vẽ cái này nhưng là đầu của đậu mầm ai vẽ được thì vẽ nha =)

làm câu 1) và câu 3). Không cần vẽ parabol và đường thẳng

Làm hộ mình ạ. Hứa vote 5 sao luôn và ngay

Dịch giúp mình bài đọc ''The Lord of the Rings" nha. Mình cảm ơn mọi người rất nhiều

cạnh hình vuông có cạnh là 3cm . Tính diện tích hình vuông

Mọi người ơi ! Giúp mình nữa ạ ....

Viết cho mk 7 hằng đẳng thức đáng nhớ