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
41
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
Onedayalawyer’s(律师)wifefelliiiandhewenttogetadoctor.Thedoctorwenttoseetilewoman,butbeforehewentintoth
(76)Withinafewshortyears,girlsinEuropehavebecomeheaviersmokersthanboys,forreasonsexpertsstillfailtounderstan
Everythinglivingonearth--plantsandanimalsneedotherlivingthings.Nothinglivesalone.Mostanimalsmustliveinagroup,
TheEnglish,asarace,havethereputationofbeingverydifferentfromallothernationalities.Includingtheircloseneighbors
Therearemanythingswhosemisuseisdangerous,butitishardtothinkofanythingthatcanbecompared______tobaccoproduct
I’mplanningtoholdapartyintheopenair,butIcanmakenoguaranteesbecauseit______theweather.
Ifellinlovewiththeminister’ssoninwinterwhenIturnedfourteen.HewasnotChinese.ForChristmasIprayedfortheboy,
Suchasmallmancan’t_____reachtheballoononemetrehigherthanhe.
Mybrother______whilehe______hisbicycleandhurthimself.
Time______,wewillgotoSouthKoreaforholiday.
随机试题
公式“=SUM(1,2,3,4,5,)”的值为()
男性病人,30岁,诊断为外伤性休克,怀疑脾破裂需立即手术,由门诊直接送人手术室,在医师和麻醉师看病人的同时,护士应首先处理的是
盆腔CT检查需分次口服稀释的对比剂1500ml,每次的用量为
以下存货周转次数计算公式正确的是()
科胜有限责任公司(为增值税一般纳税人)是于2009年5月8日在工商行政管理部门注册登记成立的一家高新技术企业。公司成立后发生了以下部分事项:(1)公司虽成立,但各项工作还处于筹备之中,生产还未能正常运转,直至7月20日,企业才正式投产,李某与7月
根据《助学贷款管理办法》,贷款人对高等学校的在读学生发放的助学贷款为()助学贷款。
关于专业自保公司,下列说法不正确的是()。
Walking—likeswimming,bicyclingandrunning—isanaerobicexercise,(31)buildsthecapacityforenergyoutputandphysicalend
WhichpoemwasNOTwrittenbyW.H.Auden?
WhenSakenaYacoobiwasachildinHerat,Afghanistan,shesawmanywomensuffer.Theyhadnoeducationand【C1】______ornomedic
最新回复
(
0
)