Inoldtimesmanconsideredlightningtobeoneofthegreatmysteries(神秘事物)ofnature.Infactasingleflashoflightning1.6kilometerslonghasenoughelectricitytolightonemillionlamps.TheAmericansc

Question

 

    In old times   man considered lightning to be one of the great mysteries(神秘事物)of nature.  In fact a single flash of lightning 1. 6 kilometers long has enough electricity to light one million lamps.    

The American scientist Benjamin Franklin was the first to suggest that lightning is in fact electricity formed between the earth and clouds high above. It happened in 1752. In the same year he also built the first lightning rod(避雷针)to protect buildings from being struck by lightnings.    

    Modern science has discovered that lightning is very strong and powerful. A lightning between a cloud and the earth may be as long as 13 kilometers and travels at a speed of 30 million meters per second.  Scientists have the opinion that there are about 2 000 million flashes of lightning per year. In the United States alone it kills almost one person per day.     The safest place to be in during an electrical storm is a closed car. Outside one should go close to low ground for cover and not stop under a tree. Also one should stay out of water and away from metal fences. Inside a house people should keep away from open doorways and windows and not touch wires or metal things.

1.From this passage we know lightning is_______ .

A. one of the great mysteries of nature

B. electricity high above the earth

C. a kind of light

D. the sound from the clouds

2.In the US _______.

A. every person can see lightning every day

B. at least one person is killed by lightning every day

C. there are about 6 million flashes of lightning per year

D. about one person per day dies from lightning

3.During a lightning storm it would be best if you _______.

A. stand under a tree  B. go outside  C. stay in a closed car   D. stop near windows

4.A lightning rod can _______.

A. prevent accidents caused by lightning   

B. stop lightning

C. protect buildings from being washed away

D. delay the coming of lightning

 

Answer 1

【答案】   1.B 2.D 3.C 4.A 【解析】 试题分析：文章介绍了闪电，以及在闪电中如何保护自己。 1.B 细节题。根据第二段第二行lightning is in fact electricity formed between the earth and clouds high above.说明B正确。 2.D 细节题。根据第三段第四行In the United States alone it kills almost one person per day.说明D正确。 3.C 细节题。根据第三段第五行  The safest place to be in during an electrical storm is a closed car.说明C正确。 4.A 细节题。根据第二段3 4行In the same year he also built the first lightning rod(避雷针)to protect buildings from being struck by lightnings.说明避雷针可以避免闪电发生的事故。 考点：考查科普类短文阅读 点评：本文比较简单，与考生的日常生活也比较贴切，仍然对细节题的考查偏高。