题目内容
1.Today there are more fires than in the past.Over 100,000wildfires burn each year in America.Russia has 20,000to 35,000wildfires every year.Australia has on average 60,000each year.These fires destroy(损害)huge areas of forests and burn hundreds of homes.Many experts believe there are several reasons for this sudden increase in fires.The first reason is climate(气候)change.Recent weather has been warmer and drier.This leads to dangerous fire conditions.When lightening strikes(发生雷电),dry grass easily catches fire.Hot winds add to the problem.The wind spreads a fire quickly.In 2010,Russia had the hottest and driest summer in a century.In just one month,500fires destroyed over 2,000homes.Some people lost their lives.
Traditional fire-fighting practices are another reason for the increase in fires.In America,firefighters used to quickly put out every fire.They didn't allow the grass and trees to burn.As a result,today many forests have thicker vegetation(植被).Thicker vegetation means more fuel(燃料)for fires.Also,without fires from time to time,forests become overcrowded and unhealthy.Some trees are dead.The dead wood then easily catches fire.So surprisingly,America has many more fires today partly because of its past fire-fighting practices.
Scientists now understand that a fire can be a natural part of a healthy forest.As a result,countries like Australia allow more fires to burn naturally.Sometimes,fire fighters even start fires to get rid of(去除)dead wood.Of course,they carefully control the fires.The fire thins out old trees.This allows sunlight to reach the ground.As a result,fires help new trees to grow.Therefore,if a fire is not a serious threat(威胁)to people,firefighters may let it burn naturally.
61.How many wildfires are there in Australia in one year?60,000.
62.Why did Russia have so many fires in one month in 2010?Because Russiahadthehottestanddriestsummerinacentury.
63.What are the reasons for the increase in fires?Climate change and traditionalfire-fightingpractices.
64.Are forests very healthy without fires from time to time?No,they aren't.
65.What is the main idea of Paragraph 4?Afirecanbeanaturalpartofahealthyforest..
分析 这篇短文主要介绍了现在比过去有更多的森林火灾,主要原因是干燥,炎热及大风.同时人们还发现严格的灭火使森林植被更厚,更容易起火.现在科学家认识到只要大火对人类构不成严重的威胁,不是所有的火都要被熄灭.
解答 答案:61. 60,000.细节理解题.根据第一段第一行句子Australia has on average 60,000 each year.澳大利亚平均每年有六万起.可知澳大利亚平均每年有六万起.故答案为60,000.
62.Because Russia had the hottest and driest summer in a century. 细节理解题.根据第二段第二行句子In 2010,Russia had the hottest and driest summer in a century.2010年,俄罗斯经历了一个世纪以来最炎热和干燥的夏天.可知因为俄罗斯经历了一个世纪以来最炎热和干燥的夏天.故答案为Because Russia had the hottest and driest summer in a century.
63.Climate change and traditional fire-fighting practices. 细节理解题.根据第二段第一行句子The first reason is climate(气候)change.第一个原因是气候的变化.和第三段第一行句子Traditional fire-fighting practices are another reason for the increase in fires.传统的消防练习是另一个火灾激增的原因.可知气候的变化和传统的消防练习是火灾激增的原因,故答案为Climate change and traditional fire-fighting practices.
64.No,they aren't. 细节理解题.根据第三段第二行句子Also,without fires from time to time,forests become overcrowded and unhealthy.而且,在没有火灾的情况下森林变的拥挤和不健康.可知是不健康的.故答案为No,they aren't.
65.A fire can be a natural part of a healthy forest. 细节归纳题.根据整段内容及其第一句话Scientists now understand that a fire can be a natural part of a healthy forest.科学家们现在明白了火是健康森林的一部分.故答案为A fire can be a natural part of a healthy forest.
点评 做题时首先对原文材料迅速浏览,掌握全文的主旨大意.其次,细读题材,各个击破.掌握全文的大意之后,细细阅读材料后的问题,弄清每题要求后,带着问题,再回到原文中去寻找、捕获有关信息.
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