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
Hibernation Hibernation is one of the main adaptations that allow certain northern animals to survive 【1】, cold winters. Hib
Hibernation Hibernation is one of the main adaptations that allow certain northern animals to survive 【1】, cold winters. Hib
admin
2012-05-23
41
问题
Hibernation
Hibernation is one of the main adaptations that allow certain northern animals to survive 【1】, cold winters. Hibernation is like a very deep sleep that allows animals to save their energy when there is little or【2】food available. The body functions of "true hibernators" go through several changes【3】they are hibernating. Body temperature drops, and the heart rate 4 . For example, a hibernating woodchuck’s body temperature drops by more than 30 degrees Celsius, and its heart rate is down from 80 to【4】beats per minute! Other true hibernators include the jumping mouse, little brown bat, eastern chipmunk, and several ground squirrels. Other animals, such as the skunk and raccoon, are not considered true hibernators,【5】they wake up in the winter to feed, and their body【6】do not change as much. Since they only sleep for a little bit at a time, the term dormancy or "light sleeping" is used to describe their behavior.
The largest animals to hibernate are bears. Their heart rate may slow down from a usual 40 -50 beats per minute to 8-12 beats per minute,【7】their body temperature changes very little, so they are able to wake up quickly.
Hibernating animals have a special substance in the blood called hibernation inducement trigger, or HIT. This substance becomes active in the fall, when the days become cooler and shorter. When HIT becomes active, the animals start【8】for winter. Some animals store food so that they can eat when they wake up, and some animals eat a lot in late summer and fall to add excess fat to their bodies. This fat keeps them warmer and acts【9】a source of energy while they are sleeping. Some animals also make changes to the places【10】they will sleep. They add leaves and grasses to keep them warm.
选项
A、for
B、but
C、as
D、since
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/TjGC777K
本试题收录于:
英语题库普高专升本分类
0
英语
普高专升本
相关试题推荐
Whensheheardthebellringing,Lucyrosefromherchairandmadeherwaytothedoor,whileherhusbandsatrootedinhisseat
Awomanismorelikelytoseehercar,rifle,orcomputerasausefultoolbutnotinitselffascinating.
Foronereasonoranother,allcountriesimposetradebarriersoncertaingoodscrossingtheirborders.
Vegetablegardeningistherelaxingartandscienceofturningaloveforgrowingplantsintoameaningfulactivity.Havingvege
A、treasureB、treatC、pleasureD、pleasantB
ThewinddieddownandtheGreatwallatMutianyuwasbathedinwarmsunshineandclearbluesky.Thislengthofwallismuchle
ThewinddieddownandtheGreatwallatMutianyuwasbathedinwarmsunshineandclearbluesky.Thislengthofwallismuchle
Whenyouaretravelling,whetheronbusinessorforpleasure,youoftenneedtostayinahotel.Thekindofhotelyouchoosepr
Thelastfewyearshaveseennewwealthinthegroupofwhite-collarworkersinChina.Primarilythisgroupconsistsoflawyers,
随机试题
__________,不破楼兰终不还。
患者,女性,48岁,患1型糖尿病30年,因感冒、体温39℃、食欲减退、恶心呕吐及腹痛而入院。该患者病情逐渐平稳,过度为皮下胰岛素注射治疗。患者主诉最近半年来,经常感到双足趾针扎样刺痛,双足有穿着袜子的异常感觉。根据病人的病史,应考虑患者出现了何种并发症
甲在向乙催要赌债无果的情况下,纠集好友把乙挟持至甲家,并给乙家打电话,声称如果再不还钱,就砍掉乙一只手。甲的作为:( )。
员工之间在工作空间上的接近度和企业监控、激励员工的方式之间存在的关系表现为()。
下列会计科目中,在编制会计报表时属于资产项目的是()。
A公司2×20年10月份与乙公司签订一项销售合同,由于A公司未按合同发货,致使乙公司发生重大经济损失。被乙公司起诉,至2×20年12月31日法院尚未判决。A公司2×20年12月31日针对该事项在资产负债表中的“预计负债”项目合理反映了700万元的预计赔偿款
小学后期、初中时期学生的学习动机是()。
(1)环保部门组织人员跟踪监测(2)大庆河流域鱼虾长势好于往年(3)红利化工厂发生爆炸事故(4)来医院就诊的病人数量明显增多(5)市政府召开紧急会议
Wheredidthestoryhappen?Howmuchdidtheyoungmanaskforthewatch?
A.supplementedB.directC.expectationD.latterE.predominantlyF.outbreakG.laterH.sharplyI.abundanceJ.again
最新回复
(
0
)