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
2018-11-11
28
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. Other do not.
Some scientists believe that hibernation is started by ______.
选项
A、over-eating
B、calcium deposits
C、a body chemical
D、a lack of water
答案
C
解析
由第二段最后一句“Some Scientists…animals release a chemical that starts them hibernating.”可知,C项符合题意,故选C。
转载请注明原文地址:https://kaotiyun.com/show/BIaC777K
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
Pickouttheappropriateexpressionfromtheeightchoicesandcompletethefollowingdialoguebyblackeningthecorrespondingl
Cotton,likesilk,wasdiscoveredandmade【61】clothbymanbeforethehistoricalperiod【62】.ItsfirstrecordedusewasinIndia
Pickoutthe-appropriateexpressionsfromtheeightchoicesbelowandcompletethefollowingdialogsbyblackeningthecorrespon
Forthispart,youaresupposedtowriteacompositionin100—120wordsbasedonthetopicWhataForeignStudentShouldDoinC
Iknowitisdifficult______himtotalklikethelecturer,butIthinkheshouldgraspeverychance.
AveryrapidincreaseinthenumberofshipssailingbetweenAmericanandEuropeanportsbeganalmostimmediatelyaftertheend
Smoking,whichmaybeapleasureforsomepeople,isaserioussourceofdiscomfortfortheirfellows.【21】,medicalauthoritiese
IoncewenttoatowninthenorthofEnglandonbusiness.Itwasabout7:30intheeveningwhenIreachedthehotel.Them
Wefindthatbrightchildrenarerarelyheldbackbymixed-abilityteaching.Onthecontrary,boththeirknowledgeandexperienc
Heis______nervous______hemovedabouttheroomallthetime.
随机试题
下列不属于企业组织行政手段的是()
下列哪项不会导致产后出血
产后发热的治疗主要是
小林是新患者秦某的责任护士,第一次与秦某交流就失败,以下哪项可能是导致失败的原因
《关于开展个人消费信贷的指导意见》于()年2月颁布。
正是有了对现行户籍制度一点一滴的改动和松动,户籍坚冰才会一点一点地消融,彻底打破户籍壁垒才有希望。所以,用公平性标准来评判当前改革尝试和建议的合理性、有效性是非常具有迷惑性的误导,除了会迟滞户籍制度改革进程,不会有任何积极作用。现实永远不会有理想中的完美,
教师根据教学目标创设一定的问题情境,并通过这一问题情境,使学生产生认知冲突;然后,在教师的指导下学生运用已有的知识和相应的材料进行探究,提出解决问题的假设并验证假设,以此获得知识和发展能力的方法是()。
企业按照两种或两种以上不反映成本费用的比例差异的价格销售某种产品或劳务的定价方法是()。
DES加密算法采用的密码技术是(18),它采用(19)位密钥对传输的数据进行加密,著名的网络安全系统Kerberos采用的是(20)加密技术。公钥密码是(21),常用的公钥加密算法有(22),它可以实现加密和数字签名。
Ifyou【C1】______tobeginanewjobtomorrow,youwouldbringwithyousomebasicstrengthsandweaknesses.Successorfailure
最新回复
(
0
)