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Nhanhthanh
2 năm trước
7 tìm số nguyên x để phân số sau là số nguyên a,13/x-1b,x+3/x-2
Thích Trả lời Chia sẻ

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LÀM XONG NHỚ EXP GIÙM MÌNH VÌ CÁI NÀY LÀ THÀNH NGỮ KHÓ THỰC SỰ, CẦN NGƯỜI LÀM ĐÚNG 30.______, Carlos is very punctual, but he was late tonight. A. For a rule B. Like a rule C. As a rule D. For a rule of thump 31.Their team won the game, but they ______ dominated it. It was a very close game. A. at no means B. by not means C. not with any means D. by no means 32.I was taking a quiet walk last night when, ______, there wa a loud explosion. A. all in all B. all at once C. suddenly at once D. once at all 33.We'll start very soon. Roll up your ______. A. sleeves B. hands C. pants D. shirt 34.Prevention is better than ______. A. treatment B. pills C. cure D. doctors 35. Everything could be done by ______. A. a nod and bow B. a nod and wink C. a wink and a nod D. a nod and a wink 36. These workers are at the ______ of the economic ______. A. line - heap B. heap - bottom C. bottom - heap D. heap - line 37. Tickets are available on a first come, ______ basis. A. first got B. early served C. first served D. early got 38. It does my ______ to see the old place being taken care of so well. A. heart well B. heart good C. head well D. head good 39. Just take one job and do your best. Don't be a jack ______. A. for all trades B. of all tracks C. of all trades D. for all jobs 40. I don't have much cash ______, but I can get some from an automatic teller machine. A. in hand B. on hand C. into hand D. under hand 41. "I like that painting you bought. Did it cost much?" "No, the artist sold it to me for ______." A. close to nothing B. next to anything C. next to nothing D. anything next 42. "When will you be informed of the test results?" "Not until Monday, so I'll be ______ all weekend." A. at needles and pins B. on pins and needles C. on needles and pins D. at pins and needles 43. "What's Peter's cousin's name?" "It's on the tip of my ______, but I can't quite remember." A. mouth B. lips C. tongue D. memory 44. What a confusing story! I can't make ______ of it. A. sense B. meaning C. logic D. understanding 45. Many rare and precious species are now ______ the verge of extinction. A. in B. on C. from D. by 46. The overall aim of the book is to help bridge the gap between theory and practice, particularly in language teaching. The phrase “bridge the gap” is closest in meaning to ______. A. minimize the limitations B. construct a bridge C. reduce the differences D. increase the understanding 47. I don’t like a few things about my job, but______ it is quite enjoyable. A. by and large B. by mistake C. sooner or later D. what is more 48. It is______ for us to do anything about the chaotic traffic. A. out of date B. without delay C. out of the question D. out of order 49. I just couldn’t remember her name even though it was on the______ of my tongue. A. edge B. tip C. top D. front 50. When you do something, you should______. A. get through to it B. turn over a new leaf C. weigh up the pros and cons D. go down well with

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