衡水金卷先享题信息卷2023答案 重庆版四英语

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衡水金卷先享题信息卷2023答案 重庆版四英语试卷答案

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these 43N3is Shuji Nakamura.muect 44of theNakamura was 44 in 1954 in Japan. His dream was to become a physicist. He studiedsedalso 1electronic engineering at university because it seemed close to 45 . Later, he found that mostlast____of the energy used for LED s t urs in to light, not 46. At the same time, he learned that LEDsentft er red an$$L E D _ { 8 }$$This kind of 49and not break as easily as common light bulbs. Then he began to study LEDs.meAfter red and green LDs had been invented, Nakamura 48 to create blue LEDs. He$$D _ { 5 }$$m ____spent years doing experimen s(实验) . Then he used gallium nitride(氮化镓) to make light bulbs.$$D _ { 5 }$$Tscientists won the Nobel Prize in Physics in 2014.41. A. force42. A. produceB.electricitycan produce blue and white light. Finally, in 1993, this hard-working and50 man made it! His invention lit up the world. Because of the invention, he and two other993B.buildC.event D.effort43. A. heroesB.post menC.grow D. improve44. A. bornC.started D.grown46. A. lightB.electricC.pioneers D.volunteers45. A. inventionB.diedC. chemistry D.physics47. A. biggerB.powerC.heatD.electricityB.longer48. A.endedC.shorter D.smallerB.accepted C.refused D.decided49. A. materialB.size C.form D.style50. A.braveB.humor C.patient D.honest

答案是C。1.What are the speakers probably doing?A.Making a phone call.B.Waiting for a train.C.Looking for a bag.

23.Which of the following is TRUE?A.There is no free wi-fi in the hotel.B. You can only book single room in the hotel.C.Your personal information won’t be known by other people.D.You can have breakfast at 7:30 a.m.

衡水金卷先享题信息卷2023答案 重庆版四英语