4.Lightning(閃電)is shocking,and it happens all over the world!Scientists think that there are more than three million lightning strikes(襲擊)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(大氣層的)changes.When this happens,it creates a static charge(靜電電荷).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.遇難
37.We can infer(推斷)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.a(chǎn)bout 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關(guān)于閃電的事情,在地球上,每分鐘都有閃電,大概為30次,閃電不僅次數(shù)比較多,還比較危險,擊中后容易致人死亡,所以在雷電天氣最好待在室內(nèi).
解答 36.C,細節(jié)理解題,文中提到"it reaches temperatures up to 28,000degrees centigrade"閃電有時候能達到28000度的高溫,由此確定選擇C.
37.B,詞義猜測題,文中提到"Between 1942and 1983,he was hit seven times!"從1942年到1983年,經(jīng)歷過七次閃電擊中,但是現(xiàn)在還活著,由此確定該詞的意思是幸存,選擇B.
38.C,細節(jié)理解題,文中提到"When this happens,it creates a static charge"當閃電發(fā)生時,他會創(chuàng)造一個靜電電荷,由此確定選擇C.
39.A,詞義猜測題,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"盡在美國,一年就會有大約1000人被閃電擊中,大約100人最終會死亡,由此推測閃電是很危險的,并不是拿來嘻嘻的東西,由此確定選擇A.
40.D,細節(jié)理解題,文中提到"When lightning strikes,it's best to stay inside a large building"當閃電發(fā)生時,最好待在室內(nèi),由此確定選擇D.
點評 對于閱讀表達題,一定要記得首先通讀全文,了解文章大意,然后再根據(jù)文章關(guān)鍵詞,關(guān)鍵句,掌握細節(jié)問題,并進行推理判斷,再去回答具體的問題.