3．In  earliest times，men  considered  lightning to be  one of the  great  mysteries of  nature．Some ancient peoples believed that lightning and thunder were the weapons of the gods．
In  reality，lightning is a flow of  electricity  formed high above the earth．A single  flash of lightning 1.6 kilometres long has enough electricity to light one million light bulbs．
The  American  scientist and statesman，Benjamin  Franklin，was the first to show the connection between electricity and lightning  in 1752．In  the  same  year  he  also  built  the  first lightning rod（避雷針）．This device protects buildings from being damaged by lightning．
Modern science has discovered that one stroke of lightning has a voltage（電壓）of more than 15 million  volts．A flash of  lightning between a cloud and the earth may be as long as 13 kilometers，and travel at a speed of 30 million meters per second．
Scientists judge that there are about 2，000 million flashes of lightning per year．Lightning hits the Empire State  Building in New York City 30 to 48 times  a  year．In the United States alone it kills an average of one person every day．
The safest place to be in case of an electrical storm is in a closed car．Outside，one shoud go to low ground and  not  get  under a tree．Also，one should  stay out  of water  and away  from  metal fences．Inside a  house，people  should avoid  open  doorways  and windows  and not touch  wires or metal things．
With lightning，it is better to be safe than sorry．

31．People once thought lightning came fromB．
A．the sky             B．the gods          C．the earth            D．nature
32．According to the passage what do you think all buildings need？C
A．Metal fences．B．Electricity．C．lightning rods．D．Machines．
33．Lightning can travelD．
A．a(chǎn)s quickly as water
B．not so quickly as electricity
C．a(chǎn)t very low speed
D．a(chǎn)t very high speed
34．Which of the following is NOT true？C
A．In the U．S．a(chǎn)bout 360people die from lightning in a year．
B．The Empire State Building frequently gets hit by lightning．
C．Swimming during a thunder storm is a good idea．
D．A closed car is the best place to be during an electrical storm．
35．Lightning is probablyA to man．
A．useful              B．kind             C．useless             D．friendly．

分析 本文講述了人們對于閃電的認(rèn)識歷史以及知識科普．

解答 31．B．細(xì)節(jié)題．由第一段Some ancient people believed that lightning and thunder were the weapons of the gods．一些古代的人認(rèn)為雷聲和閃電是諸神的武器．故選B
32．C．細(xì)節(jié)題．第三段In the same year he also built the first lightning rod （避雷針）．This device protects buildings from being damaged by lightning．美國科學(xué)家發(fā)明了避雷針，這種裝置能夠保護(hù)建筑物不被閃電損壞，因此，所有的建筑都需要避雷針．故選C
33．D．細(xì)節(jié)題．第四段A flash of lightning between a cloud and the earth may be as long as 13 kilometers，and travel at a speed of 30 million meters per second．閃電能夠以每秒3000萬米的速度傳播．可知，它的速度相當(dāng)快．故選D
34．C．細(xì)節(jié)題．第六段one should stay out of water and away from metal fences．在雷雨交加的天氣，人們也應(yīng)該遠(yuǎn)離水和金屬物．因此，在雷雨天氣中，游泳時一個好主意是錯誤的．故選C
35．A．推理判斷題．由第二段A single  flash of lightning 1.6 kilometres long has enough electricity to light one million light bulbs，一束長1.6公里的閃電，有足夠的電力點亮100萬個燈泡．可知閃電是有用的，故選A．

點評 本篇文章主要是細(xì)節(jié)理解方面的題型，需要考生通過跳讀迅速找到對應(yīng)的句子進(jìn)行詳細(xì)理解，句子的理解可以結(jié)合上下文意思，通過邏輯推理得到．

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