Starting in l972.the National Park Service established a policy for forest fires calle Natural Burn．It was acknowledged that some forest fires.such as those caused by lightning were necessary for for 题目和参考答案——青夏教育精英家教网—

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5．Starting in l972，the National Park Service established a policy for forest fires calle Natural Burn．It was acknowledged that some forest fires，such as those caused by lightning were necessary for forests to maintain balanced ecosystems，so the fire should be allowed to burn．However，a big fire in Yellowstone National Park in l988 caused this policy to be abandoned since the fire was initially allowed to burn yet soon out of control．As a result，the fire of l988 destroyed much of Yellowstone，which is America's oldest and most beloved national park．Massive areas of plants were destroyed，and large empty spaces and acres of burned and blackened trees greeted visitors．The rivers and streams were choked with ash，and the ecosystem of the park was changed beyond repair．
    In addition，great numbers of animals were killed by the fires that bumed out of control．The fires were driven by high winds，moving as many as ten miles a day．Many small animals died in the flames．The fires'rapid advances gave the wildlife little chance to escape．Even today，few of these small forest animals have returned to live in the park．In the years immediately following the fires，the numbers of visitors declined rapidly．No one was interested in seeing a blackened and treeless park on vacation．Yellowstone had previously been famous for its amazing views and unique geological formations such as the geyser Old Faithful．But now its reputation as America's wonder is damaged permanently．

46．Natural Burn was adopted because some forest fires wereC
A．hard to put out
B．started by lightning
C．good for the balance of nature
D．approved by National Park Service
47．The big fire in Yellowstone in 1988D．
A．became out of control at first
B．destroyed the park completely
C．was allowed to burn continuously
D．brought the natural burn policy to an end
48．Why were so many animals killed in the big fire？D
A．Because winds were blown from high places．
B．Because the animals moved only ten miles a day．
C．Because the animals lived in lower places．
D．Because strong winds contributed to the fire a lot．
49．Yellowstone was famous for itsC．
A．rare animals   B．unique plants    C．beautiful scenery D．little streams
50．The text probably comes fromD．
A．a science fiction    B．a news report
C．a commercial ad     D．a geography magazine．

分析从1972年以来国家公园管理局颁布了一项政策：对于由闪电引起的自然火灾采取放任态度，认为这有助于自然平衡．但是1988年黄石自然公园的大火发生后，这项制度被废除了，因为火灾会带来巨大的损失．本文讲述的就是自然火灾对黄石自然公园的影响．

解答 46．C．细节理解题．根据文章第一段"such as those caused by lightning were necessary for forests to maintain balanced ecosystems，"可知，在过去人们认为自然火灾会对生态平衡有益，故选C．
47．D．细节理解题．根据文章第一段"owever，a big fire in Yellowstone National Park in l988 caused this policy to be abandoned"可知，黄石火灾的发生结束了这一制度，故选D．
48．D．细节理解题．根据文章第二段"The fires were driven by high winds，moving as many as ten miles a day．Many small animals died in the flames．"可知，为大风助长了火势，很多动物来不及逃走就被烧死了，故选D．
49．C．细节理解题．根据文章第二段"Yellowstone had previously been famous for its amazing views and unique geological formations such as the geyser Old Faithful．"可知，黄石公园因为自然风光而闻名，故选C．
50．D．推理猜测题．通读全文可知，本文介绍的是自然火灾对于森林的影响，属于自然地理范畴，由此判断文章应选自地理杂志，故选D．

点评本文是健康环保类阅读，考查学生的细节理解和推理判断能力．做细节理解题时一定要找到文章中的原句，和题干进行比较，再做出正确选择．在做推理判断题时不要以个人的主观想象代替文章的事实，要根据文章事实进行合乎逻辑的推理判断．

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73．Why does Boulding compare the way economy is run with cowboy and spaceship？D
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B．To applaud the appearance of ecological economists．
C．To arouse people's interest in cowboys'adventures on grassland．
D．To awaken people to the need of sustainable development of economy．
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科目：高中英语 来源： 题型：阅读理解

16．

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