题目内容
1.Today there are many 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.
68.Why did Russia have so many fires in one month in 2010?D
A.Because lightening spread the fire.
B.Because there was much fuel for fires.
C.Because there were not enough firefighters.
D.Because it was unusually hot,dry and windy.
69.What happens because of the traditional fire-fighting practices in the USA?B
A.There are fewer wildfires.
B.Trees and grass become thicker.
C.The weather becomes warmer and drier.
D.Sunlight reaches the ground to help forests.
70.What is the main idea of Paragraph 4?C
A.Fires are serious threats to human beings.
B.Australian firefighters don't put out fires.
C.Fires can play an important role I forests.
D.It's difficult for firefighters to control the fires.
71.Which of the following is true according to the passage?A
A.Not all the fires in the forests must be put out.
B.People's carelessness leads to dangerous fires.
C.Australia allows all the fires to burn naturally.
D.There are more fires in Russia than in the USA.
分析 今天比过去有更多的火灾.每年在美国有超过十万起野外火灾.俄罗斯每年有2万到3万5千起野外火灾.澳大利亚平均每年有六万起.这些火灾损害了大面积的森林和许多家庭.
许多专家相信对于这种火灾的激增有几个原因.第一个原因是气候的变化.现在的天气已经变得更加温暖和干燥.这导致了危险的火灾条件.当发生雷电,干草很容易就会引发火灾.热风增加了这一难题,风快速蔓延火灾.2010年,俄罗斯经历了一个世纪以来最炎热和干燥的夏天.仅仅一个月,500起火灾就损害了2000个家庭,一些人失去了生命.
传统的消防练习是另一个火灾激增的原因.在美国,消防员过去快速把每一处火都扑灭,他们不允许草和树燃烧,结果很多森林有更厚的植被,厚的植被意味着给火灾更多的燃料.而且,在不时没有火灾的情况下森林变的拥挤和不健康.一些树死了,这些朽木很容易引发火灾.所以令人惊讶的是,美国今天更多的火灾,部分原因是过去的消防措施.
科学家们知道火可以是森林健康的自然的一部分.因此像澳大利亚的科学家允许更多的火灾自然燃烧.有时消防员甚至点火去除朽木.当然他们会小心的控制火势.这些火让老树变的稀薄,这就能叫阳光照射到地面,所以火可以帮助新树生长.因此,如果火对人类不再是一个严重的威胁,消防员可以让它自然地燃烧.
解答 68.D 细节与逻辑推理.根据原文"In 2010,Russia had the hottest and driest summer in a century."(2010年,俄罗斯经历了一个世纪最炎热干燥的夏天),同时根据文段总起句子"The first reason is climate(气候)change",可知是与气候有关.选项D的内容与气候相关,因此推测出本题答案为D.
69.B 逻辑推理.根据第三段中"As a result,today many forests have thicker vegetation(植被)."(结果,今天的森林有了更厚的植被)可以得知本题选B.
70.C 主旨归纳.做这一题要紧紧抓住第四段的中心句"Scientists now understand that a fire can be a natural part of a healthy forest"(科学家们知道火可以是森林健康的自然的一部分)这句话,知道整段都是讲的适当的火灾对森林有益的一面,再结合选项,排除掉其他无关的选项,就可推断出答案选C.
71.A 结合全文判断正误.需要对选项逐个分析,选择一个与原文内容吻合的说法.可以用排除法.选项A说并不是所有的火都必须被扑灭,我们从第四段可知这一说法是正确的;B说人们的疏忽导致了危险的火灾,这个文章没有涉及,故不选;C说澳大拉亚允许所有的火自然燃烧,显然过于绝对,错在"all"一词;D说俄罗斯比美国有更多火灾,文章没有进行比较,没有涉及这一内容.综合以上分析,选择A是正确的答案.
点评 这是一篇涉及自然常识的阅读理解题,出现了多种题型,包括细节题,逻辑推理题,判断正误题,以及主旨归纳题.在做题过程中,要掌握不同的阅读技巧,比如对于68、69的细节题,需要找到相关的句子去选择,包括抓住文段中的主旨句去推测;对于70题的主旨归纳题需要找到第四段的中心句,从总体上进行把握;71题的判断正误题要求了解文章大意,在全盘掌握文章内容的基础上才能选出正确的答案.所以在阅读中要根据不同的题型采取与之相对应的阅读方法很重要.
A. | What | B. | What a | C. | What an | D. | How |
-________.I'd like something to eat.( )
A. | Yes,please. | B. | No problem. | C. | That's OK. | D. | No,thanks. |
A:Hi,Tom!You look very happy today.
B:Oh,yes.Guess what?My best friend Ben is coming.
A:Oh,really?(66)C
B:Tomorrow.I can't wait to see him.
A:(67)A
B:For two weeks.
A:(68)E
B:He is really friendly.I'm sure you will like him when you see him.
A:What does he look like?
B:(69)F
A:Could you introduce him to me?
B:(70)B
A.How long will he stay? B.Of course. C.When is he coming? D.What is it? E.What is he like? F.He is tall and strong. G.How often does he visit you? |