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
专升本
Animals have different ways of protecting themselves against wintertime weather. Some animals grow heavy coats of fur or feather
Animals have different ways of protecting themselves against wintertime weather. Some animals grow heavy coats of fur or feather
admin
2012-12-31
112
问题
Animals have different ways of protecting themselves against wintertime weather. Some animals grow heavy coats of fur or feathers, while others dig into the ground to find a warm wintertime home.
Some animals spend the winter in a deep sleep because by going to sleep they avoid the time of the year when food is scarce and the temperatures are low. Their sleep is known as hibernation.
There is much about hibernation that puzzles scientists. For example, they are wondering how hibernation came into being. Some scientists have explored the possibility that animals release a chemical that starts them hibernating.
One thing that scientists are certain about is that animals hibernate only when it is cold. Hibernation is a seasonal practice.
Some animals that fall into a wintertime sleep are not true hibernators because they spend only a part of the cold season asleep. Bears, for example, can easily be awakened from their winter nap. They are not true hibernators.
Sometimes it is difficult to determine whether a particular animal is a true hibernator. For example, some mice hibernate, but others do not. The same is true of bats. Some of them hibernate. Others do not.
The main idea of this passage is ______.
选项
A、many animals die during hibernation
B、hibernation protects animals during the wintertime
C、scientists feel puzzled about hibernation
D、some bats hibernate and others do not
答案
C
解析
第三段和最后一段都点明了主题。科学家对动物的冬眠仍有很多疑问。选项C是正确的。
转载请注明原文地址:https://kaotiyun.com/show/95eC777K
本试题收录于:
英语题库成考专升本分类
0
英语
成考专升本
相关试题推荐
Booksareforreading,butmanmustbringtotheirreadingadesiretolearnandapowerofabsorbing.Readingshouldbeactive,
(76)Withinafewshortyears,girlsinEuropehavebecomeheaviersmokersthanboys,forreasonsexpertsstillfailtounderstan
Suddenlyheheardsomeone______gentlyonthewindow.
GeorgeBernardShaw,thegreatestBritishdramatist(居作家)ofthefirsthalfofthe20thcentury,wasborninDublin,Ireland.Hi
Therearemorethan100millioncarsintheUnitedStates.Anormalcargetslessthan15milesfromeachgallonofgas.Ittrav
In1807NoahWebsterbeganhisgreatestwork,AnAmericanDictionaryoftheEnglishLanguage.Inpreparingthework,hedevoted
Alandnotsufferingfromdestruction,pluswealth,naturalresources,andlaboursupply--allthesewereimportantfactorsinhe
TheAmericanideaofcustomerserviceistomakeeachcustomerthecenterofattention.PeoplegoingshoppinginAmericacanexp
______heworkshard,Idon’tmindwhenhefinishestheexperiment.
随机试题
会计制度设计的对象是指()
血涂片经瑞氏染色后细胞核不着色或着色浅,而胞质着色尚可,最可能的原因是
先天性心脏病最主要的病因是( )。
根据病情,病人目前最主要的护理诊断是
依据《环境影响评价技术导则非污染生态影响》,下列()自然资源开发1级项目提交的成果除完成基础图件外,要充分应用“3S”一体化、多媒体等高新信息技术手段进行生态影响评价,并提交相应成果。
ABC公司的管理会计师正在分析该公司的财务数据,销售利润率为15%,市盈率为20倍,每股收益为$2.5,应收账款天数为65天,财务杠杆率为3,速动比率为0.6。基于这些信息,就资产回报率和权益回报率,该管理会计师能得出以下哪个结果?
学生的态度与道德行为在很大程度上受到他们所归属的______的行为准则和风气影响。
企业未设置“预付账款”科目,发生预付货款业务时应借记()科目。
根据下列图表,回答106~110题:根据上图,下列关于我国农村用电发电情况的表述,错误的一项是()。
平畴交远风,_______。
最新回复
(
0
)