题目内容
9.Winter begins in the north on December 22nd.People and animals have been doing what they always do to prepare for the colder months.Squirrels (松鼠),for example,have been busy gathering nuts from trees.Well,scientists have been busy gathering information about what the squirrels do with the food they collect.They 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.The black walnut is the nut of choice for both kinds of squirrels.The 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 now at 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.But they seldom remember where they buried every nut.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.Professor Swihart calls"death traps for seeds".
Gray squirrels are native to Indiana.But 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 Indiana.Jake Goheen calls them a sign of an environmental problem more than a cause.
68.The study done by Rob Swihart and Jake Goheen is toB.
A.find out the living conditions for squirrels
B.learn squirrels'influence on black walnut trees
C.do something to get rid of squirrels
D.save the forests in the American state of Indiana
69.The difference between gray squirrels and red squirrels mainly lies inD.
A.the way they gather the walnut
B.the time they have winter sleep
C.the place they have winter sleep
D.the place they store the walnuts
70.When Professor Swihart says"death traps for seeds",he actually means thatC.
A.red squirrels eat more nuts than gray squirrels
B.gray squirrels and red squirrels will have severe fights
C.nuts above the ground will not develop into plants
D.seeds can be traps for other animals in the forest
71.According to the passage,which of the following is true?A
A.The black walnut is equally attractive to both gray and red squirrels.
B.Gray squirrels do more harm to the forest than red squirrels.
C.Red squirrels and gray squirrels have helped the spread of walnut trees.
D.The cleaning of forest land benefits red squirrels directly.
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 68---71 BDCA
68.答案B.细节理解题.根据第二段第二句"The scientists wanted to know how these differences could affect the growth of black walnut (黑胡桃) trees."可知,科学家研究红松鼠和灰松鼠以查明它们的生活习惯会对黑胡桃的生长产生什么样的影响.故选B.
69.答案D.细节理解题.根据第三段的"Gray squirrels and red squirrels do not store nuts and seeds in the same way."可知,它们储藏坚果和种子的方法不一样.故选D.
70.答案C.句意理解题.根据第三段最后一行"store large groups of nuts above ground"可知,坚果埋在一个坑里的话,不容易成活.故选C.
71.答案A.细节理解题.根据第二段第二行的"as many walnuts grow when gathered by gray squirrels as compared to red squirrels"可知,红松鼠和灰松鼠都喜欢黑胡桃,A正确;根据第四段"their numbers began to decrease as more forests were cut for agriculture"可知,灰松鼠依赖森林,B错;C、D未提及.故选A.
点评 科教类阅读文应对策略:
1、要想做好科普英语阅读理解题,同学们就要注意平时多读科普知识类文章,学习科普知识,积累常见的科普词汇,从根本上提高科普英语的阅读能力.
2、要熟悉科普类文章的结构特点.科普类文章一般由标题(Head line),导语(Introduction),背景(Back ground),主体(Main body)和结尾(End)五部分构成.标题是文章中心思想高度而又精辟的概括,但根据历年的高考情况来看,这类阅读理解材料一般不给标题,而要同学们选择标题.导语一般位于整篇文章的首段.背景交待一个事实的起因.主体则对导语概括的事实进行详细叙述,这一部分命题往往最多,因此,阅读时,同学们要把这部分作为重点.结尾往往也是中心思想的概括,并与导语相呼应,命题者常在此要设计一道推理判断题.
3、在进行推理判断时,同学们一定要以阅读材料所提供的科学事实为依据,同时所得出的结论还应符合基本的科普常识.
A. | to planting | B. | to plant | C. | plant | D. | planting |