首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
A、They will have longer time to conserve energy. B、They will not need to migrate any more. C、They will have longer ice-free peri
A、They will have longer time to conserve energy. B、They will not need to migrate any more. C、They will have longer ice-free peri
admin
2022-08-11
68
问题
Winter is a pain in the animal kingdom. Birds can flee it by migrating to warmer regions but land beasts, including mammals, have no choice but to stick around. To cope with it, many species have learned to spend the winter in a long sleep. Some, like the Columbian ground squirrel, spend up to nine months of each year in their shelters. This conserves energy but leaves them with only three months to become well-rounded for the next winter and, crucially, to reproduce.
To make matters worse, climate change is leading them to emerge from winter sleep later than usual. Global warming means that creatures have longer ice-free periods to go about their evolutionary tasks. But it can also disturb weather patterns, which may have the opposite effect.
Because female squirrels remain in their place of birth, the researchers were able to tag and observe them and their offspring each year for the past two decades. A typical female would bear three babies. On average, only 30% of them survive the first winter, enough to sustain population numbers since female squirrels can expect three or four litters in their lifetime. If the proportion falls, however, the population reduces.
In the first decade of the study, the number of squirrels dropped just once. But it fell in four of the past ten years. Dr. Lane, an evolutionary biologist at the University of Edinburgh, speculates that this might be explained by the fact that over the past 20 years the late snow has delayed the melting of ice by half a day each year, on average, shortening the squirrels’ breeding and feeding season by several days and disrupting their life cycles.
Questions 13 to 15 are based on the passage you have just heard.
13. How do many land animals spend the winter according to the passage?
14. What does global warming mean to animals?
15. What might explain the reduced squirrel population according to Dr. Lane?
选项
A、They will have longer time to conserve energy.
B、They will not need to migrate any more.
C、They will have longer ice-free periods to reproduce.
D、They will have enough food to survive the winter.
答案
C
解析
原文中提到,全球变暖意味着动物拥有更长的无冰期来完成进化的任务。因此答案为C。
转载请注明原文地址:https://kaotiyun.com/show/14x7777K
0
大学英语六级
相关试题推荐
A、Saltisquitenecessaryforpeople’shealth.B、Eatingtoomuchsaltcoulddoharmtotheheart.C、Thequantityofsaltvaries
A、Heoftenborrowsmoneyfromothers.B、Hehasjustreceivedhismonthlypay.C、Hecan’tpayoffhiscreditcards.D、Hehaskept
A、Thevotingprocessofitwentforwardverywell.B、Thedraftwasrewrittenlotsoftimes.C、Jeffersonplayedaminimumrolein
A、Theyhavebeencooperatingforacoupleofyears.B、Theyareabouttosignthefirstcontractbetweenthem.C、Theyhavebeenl
A、Specialeducation.B、Biomedicalengineering.C、Artificialintelligence.D、Theimagingsystem.B
A、Itprovidestoomanyentertainmentprograms.B、Itisnotaseducationalasreadingbooks.C、Itmakesussitinitsfrontpassi
A、Listeningtomusic.B、Readingbooks.C、Doingexercise.D、Exchangingfamilynews.B
A、Becauseitisastudentaffair.B、Becauseoftheschedule.C、Becauseitadvocatesahealthylifestyle.D、Becauseitistoodea
A、Interested.B、Indifferent.C、Suspicious.D、Negative.D女士建议男士选择坐游船去希腊或者土耳其旅行,男士说味道浓郁的食物不合自己的胃口,言下之意就是不接受这个建议,故选D。
A、Weird.B、Efficient.C、Tolerant.D、Toxic.D细节理解题。当男士问女士她的新工作怎么样时,女士先是在短文中说自己一点儿也不怀念以前所在公司的那种表面上很高效,实际上太过直接和严苛的管理模式,之后又在短文中说,崇尚直
随机试题
_______是继柳开之后专力写作古文的作家,其文强调教化作用,力求结构章法的变化,多用散行单句,不务雕琢堆砌,不求华靡艳丽,在宋代古文的发展上具有一定的影响。
A.交感神经B.副交感神经C.运动神经D.传入神经E.传出神经机体在安静时,()系统的活动明显增强,常伴有胰岛素的分泌
甲公司欠乙公司货款5万元,到期未还。乙公司需付甲公司加工费5万元,已过诉讼时效。对此,下列表述中正确的是()。(2008年单项选择第21题)
监理与工程施工的关系,下列表述中哪一项不合适?()
审核信用证是单证员的工作,因此,跟单员不需要了解信用证的内容。()
会计账簿类会计档案的保管期限均为20年。()
某调查显示:82%的小学生每天都会上网,84%的每天都会使用QQ,78%的每天都会使用QQ空间,65%的每天都会使用微博。据此有人认为,小学生已从媒介被动的受众转变为积极的参与者和传播者。如果以下各项为真,最能削弱上述论证的是()。
海:水
关于商品价值的说法,正确的有( )
操作系统中有一组不能被系统中断的特殊系统调用,在操作系统中称为()。
最新回复
(
0
)