4．Lightning（闪电）is shocking，and it happens all over the world!Scientists think that there are more than three million lightning strikes（袭击）every day in the world-that's thirty strikes every second．
Lightning can also be very dangerous．Every year，lightning kills people because it can start big fires or because it reaches temperatures up to 28，000degrees centigrade．American Roy Sullivan，who worked in a park，holds the record for surviving the most lightning strikes．Between 1942and 1983，he was hit seven times!
So，why does lightning strike？Lightning strikes happen when ice and water in clouds rub（摩擦）together，and cause atmospheric（大气层的）changes．When this happens，it creates a static charge（静电电荷）．Lightning can strike inside the cloud，between two clouds and between a cloud and Earth．It's the last type of strike that is the most dangerous for humans．About 1，000people get struck by lightning every year in the United States，and about 100of them die as a result．
Lightning is certainly not something to toy with．When lightning strikes，it's best to stay inside a large building．To stay safe，do not stand under trees，on hills or near water．Trees attract lightning．Also，do not lie down on the ground，otherwise the electricity may go through you and cause a heart disease．
36．Lightning strikesC．
A．happen three billion times each day
B．will start when there are big fires
C．can reach very high temperatures
D．kill all those who work in a park
37．What does"surviving"in paragraph 2mean in Chinese？B
A．目睹 B．幸存 C．制造 D．遇难
37．We can infer（推断）from paragraph 3thatC．
A．lightning strikes are caused whenever ice and water meet
B．lightning between two clouds is the most dangerous for humans
C．lightning strikes create static charge
D．about one tenth of the people struck by lightning die every year in America
39．Which expression means"to toy with"in the last paragraph？A
A．to play with
B．to take seriously
C．to show off
D．to take it easy
40．Where's the best place to be when lightning strikes？D
A．On top of a hill．
B．In a swimming pool．
C．In a tree．
D．Inside．
分析 文章大意：
文章主要提到的是有关于闪电的事情，在地球上，每分钟都有闪电，大概为30次，闪电不仅次数比较多，还比较危险，击中后容易致人死亡，所以在雷电天气最好待在室内．
解答 36．C，细节理解题，文中提到"it reaches temperatures up to 28，000degrees centigrade"闪电有时候能达到28000度的高温，由此确定选择C．
37．B，词义猜测题，文中提到"Between 1942and 1983，he was hit seven times!"从1942年到1983年，经历过七次闪电击中，但是现在还活着，由此确定该词的意思是幸存，选择B．
38．C，细节理解题，文中提到"When this happens，it creates a static charge"当闪电发生时，他会创造一个静电电荷，由此确定选择C．
39．A，词义猜测题，文中提到"About 1，000people get struck by lightning every year in the United States，and about 100of them die as a result"尽在美国，一年就会有大约1000人被闪电击中，大约100人最终会死亡，由此推测闪电是很危险的，并不是拿来嘻嘻的东西，由此确定选择A．
40．D，细节理解题，文中提到"When lightning strikes，it's best to stay inside a large building"当闪电发生时，最好待在室内，由此确定选择D．
点评 对于阅读表达题，一定要记得首先通读全文，了解文章大意，然后再根据文章关键词，关键句，掌握细节问题，并进行推理判断，再去回答具体的问题．
