题目内容

11.Winter begins in the north on December 22nd.People and animals have been doing what they always do to prepare for the colder months,Sqzeirrels,for example,have been busy gathering nuts from trees.(56)GThey examined differences between red squirrels and gray squirrels in the American state of Indiana.The scientists wanted to know how these differences could affect the growth of black walnut(黑胡桃)trees(57)DThe black walnut tree is also a central part of some hardwood forests.
Rob Swihart of Purdue University did the study with Jake Goheen,a former Purdue student nowat the University of New Mexico.The two researchers estimate that several times as many walnuts grow when gathered by gray squirrels as compared to red squirrels.Gray squirrels and red squirrels do not store nuts and seeds in the same way.Gray squirrels bury nuts one at a time in a number of places.(58)B So some nuts remain in the ground.Conditions are right for them to develop and grow the following spring.Red squirrels,however,store large groups of nuts above ground.
(59)ABut Professor Swihart says their numbers began to decrease as more forests were cut for agriculture.Red squirrels began to spread through the state during the past century.The researchers say red squirrels are native to forests that stay green all year,unlike walnut trees.They say the cleaning of forest land for agriculture has helped red squirrels invade(涌入)Indiana.(60)E

A.Gray squirrels are native to Indiana.
B.But they seldom remember where they buried every nut.
C.Red squirrels bury nuts in a different way.
D.The black walnut is the nut of choice for both kinds of squirrels.
E.Jake Goheen calls them a sign of an environmental problem more than a cause.
F.Scientists are  worried  that they will drive away the gray squirrels.
G.Well,scientists have been  busy gathering information about what the squirrels
do with the food they collect.

分析 文章讲述了红松鼠和灰松鼠的生活习性以及它们的不同生活方式给环境带来的影响.

解答 GDBAE
56.答案:G,根据下文They examined differences between red squirrels and gray squirrels in the American state of Indiana提到他们在美国印第安纳州调查红松鼠和灰松鼠的不同,因此前面应出现they指代的是谁,故答案为G,指科学家一直在收集关于松鼠如何处理食物的信息.
57.答案:D,前文提到black walnut tree,因此此空解释black walnut tree 是什么东西,与下一句The black walnut tree is also a central part of some hardwood forests构成平行,都是用来说明黑胡桃树是什么,故答案为D.
58.答案:B,前面提到Gray squirrels bury nuts one at a time in a number of places"灰松鼠把每一个坚果都藏在不同的地方",后一句So some nuts remain in the ground"有一些坚果还在地下"可知灰松鼠藏完后也不记得每一个坚果的位置,故答案为B.
59.答案:A,根据下文The researchers say red squirrels are native to forests可知此空提到的是灰松鼠是原产于印第安纳州的,故答案为.
60.答案:E,前文提到由于农业发展对森林的砍伐使得红松鼠涌入印第安纳州的想象,最后解释说这种现象是环境问题的征兆,而不是其成因,故答案为E,对前文进行一种观点的阐述.

点评 阅读这类文章时,也应该在整体把握文章结构的前提下,主要注意细节信息.做题时,根据所提问题用寻读、跳读的方法可达到事半功倍的效果.

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