内容正文:
话题九:科普知识和现代科技
话题语块梳理
话题完形阅读练习
话题下扩句练习
佳句集锦
写作练笔
In recent years, with more and more cars on the road, flying robots are used to deliver(递送) mails. Flying robots can __41__ mails to people's houses without having to deal with heavy __42__. But they will spend too much time in returning. A research center is trying to improve its flying robots with the __43__ of homing pigeons (信鸽).
Homing pigeons are pigeons that are ___44___ trained to fly home from somewhere else. In tests, researchers __45__ that homing pigeons were __46__ efficient (高效的) than flying robots at returning to their home. So the research center is trying to use a flying robot, together with a _____47_____, to deliver mails. After the robot finishes its tasks, it can __48__ the pigeon back in the shortest possible time.
Although it will cost more money to __49__ pigeons, the research center says that it can __50__ time. And the time it saves will make up for the cost.
话题完形练习
41. A. invite B. carry C. blow D. kick
42. A. traffic B. rain C. fire D. pollution
43. A. help B. luck C. treat D. interest
44. A. poorly B. carelessly C. specially D. musically
45. A. promised B. joked C. planned D. found
46. A. less B. more C. little D. much
47. A. homing pigeon B. big house
C. leading person D. heavy car
48. A. train B. knock C. follow D. steal
49. A. dress B. paint C. clean D. raise
50. A. expect B. show C. kill D. save
话题完形练习
In recent years, with more and more cars on the road, flying robots are used to deliver(递送) mails. Flying robots can __41__ mails to people's houses without having to deal with heavy __42__. But they will spend too much time in returning. A research center is trying to improve its flying robots with the __43__ of homing pigeons (信鸽).
Homing pigeons are pigeons that are ___44___ trained to fly home from somewhere else. In tests, researchers __45__ that homing pigeons were __46__ efficient (高效的) than flying robots at returning to their home. So the research center is trying to us