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15.解:(1)“天问一号”在火星表面附近做匀速圆周运动的速率v=(1分)根据线速度的定义v=2元R(1分)解得R=sT2元t°(2分)(2)根据万有引力提供向心力,有-m()R(2分)解得M=s3T2元Gt3(1分)
Having experienced a shocking electrical accident, which caused him to become both blind and deaf, James Francos world became completely dark and quiet for almost ten years. The loss of sight and hearing threw him into such sorrow that he tried a few times to put an end to his life. His family, especially his wife, did their best to tend and comfort him and finally he regained the will to live.
One hot summer afternoon, he was taking a walk with a stick near his house when a thunderstorm started all at once. He stood under a large tree to avoid getting wet, but he was struck by the lightning. Witnesses thought he was dead but he woke up 20 minutes later, lying face down in muddy water. He was trembling badly, but when he opened his eyes, he could hardly believe what he saw: a tree and a muddy road. When Mrs. Franco came running up to him, shouting to their neighbors to call for help, he could see her and hear her voice for the first time in nearly ten years.
The news of James regaining his sight and hearing quickly spread and many doctors came to examine him. Most of them said that he regained his sight and hearing from the shock he got from the lightning. However, none of them could give a compellent answer as to why this should happen. The only reasonable explanation given by one doctor was that, since James lost his sight and hearing as a result of a sudden shock, perhaps, the only way for him to regain them was by another sudden shock.
1.The reason why James attempted to kill himself was that _________.
A. a terrible electrical accident happened to him
B. nobody in the world cared about him
C. he was struck by the lightning once more
D. he had to live in a dark and silent world
2.What was James doing when he was struck by the lightning?
A. Putting an end to his life
B. Sheltering from the rain under a tree
C. Taking a walk with a stick
D. Lying on the ground
3.What does the underlined word compellent in paragraph 3 mean?
A. convincing B. wrong C. unexplained D. true
4.Which of the following can be the best title for the text?
A. A Terrible Electrical Accident
B. What a Sudden Shock
C. An Unforgettable Experience
D. James Franco and His Wife
试题答案
1.D
2.B
3.A
4.B
【解析】
试题分析:文章讲述James Franco因为受到电击,失明失聪,生活在黑暗寂静的世界里,他几次都想自杀,但有一次他在树下躲雨的时候,意外被闪电击中,却恢复了视力,医生也不能确定具体原因。
1. loss of sight and hearing threw him into such sorrow that he tried a few times to put an end to his life. His family故选D。
2. stood under a large tree to avoid getting wet,but he was struck by the lightning.可知他是在树下躲雨的时候被击中的,判断选B。
3. none of them could give a compellent answer as to why this should happen可知没有人能给出一个让人信服的答案,所以compellent意思应是令人信服的,所以选A。
4.
考点:考查生活故事类短文阅读
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