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
Bears mostly live alone, except for mothers and their babies, and males and females during mating season. Bears form temporary g
Bears mostly live alone, except for mothers and their babies, and males and females during mating season. Bears form temporary g
admin
2012-06-26
57
问题
Bears mostly live alone, except for mothers and their babies, and males and females during mating season. Bears form temporary groups only in exceptional circumstances, when food is plentiful in a small areA. Recent evidence also suggests that giant pandas may form small social groups, perhaps because bamboo is more concentrated than the patchy food resources of other bear species. Other bears may live alone but exist in a social network. A male and female may live in an area partly shared in common—although they tolerate each other, each defends, its range from other bears of the same sex. Male young usually leave their mothers to live in other areas, but female young often live in a range that is commonly shared with that of their mother.
The key to a bear’s survival is finding enough food to satisfy the energy demands of its large size. Bears travel over huge territories in search of food, and they remember the details of the landscape they cover. They use their excellent memories to return to locations where they have had success finding food in past years or seasons. Most bears are able to climb trees to chase small animals or gain access to additional plant vegetation. The exceptions are polar bears and large adult brown bears—their heavy weight makes it difficult for them to climb trees.
Bears that live in regions with cold winters spend the coldest part of the year asleep in sheltered dens, including brown bears, American and Asiatic black bears, and female polar bears. Pregnant females give birth in the winter in the protected surroundings of these dens. After fattening up during the summer and fall when food is abundant, the bears go into this winter home to conserve energy during the part of the year when food is scarce. Winter sleep differs from hibernation (冬眠) in that a bear is easily aroused from sleep. In addition, a bear’s body temperature drops only a few degrees in its winter sleep. In contrast, a true hibernator undergoes more extensive changes in bodily functions. For instance, the body temperature of the Arctic ground squirrel drops from 38℃ to as low as -3℃.
Winter sleep differs from hibernation in that______.
选项
A、animals in hibernation don’t wake up easily
B、animals in hibernation are aroused regularly for energy supply
C、the body temperature of animals in winter sleep doesn’t change
D、animals in winter sleep experience drastic changes in bodily functions
答案
A
解析
从第三段第四句“in that”可知,冬睡与冬眠之差异在于前者易被惊醒。
转载请注明原文地址:https://kaotiyun.com/show/60TO777K
0
研究生英语学位课统考(GET)
相关试题推荐
TheamendingTreatyonEuropeanUnioncanbecomelawonlyifthereis______agreementtothiseffect.(2003年中国科学院考博试题)
Ourfootballteam’s______hasbeenexcellentduringthewholeyear.
Itisa______thatinsucharichcountrythereshouldbesomanypoorpeople.(2006年中国矿业大学考博试题)
Anargumentwas______becausetheydislikedeachothersointensely.
Althoughnotaneconomisthimself,Dr.Smithhaslongbeenaseverecriticofthegovernment’s______policies.
Thediscrepancyinthecompanyaccountsisso______thatnoauditorcouldhavefailedtonoticeit.(2003年中国人民大学考博试题)
Fingerprintsformanunchangeablemark______despitechangesintheindividual’sappearanceorage.
Hewas______inhissupportofthegovernor’spoliciesofsocialwelfareaffairs.
Aroundtheworldmoreandmorepeoplearetakingpartindangeroussportsandactivities.Ofcourse,therehavealwaysbeenpeop
Supposeyouarethereinthemuseum,withthehead-sizedsmartphonepermanentlypositionedinfrontofyournose.Accordingtoa
随机试题
A.凝滞B.黏滞C.伤津耗气D.伤阴E.伤津(1993年第77,78题)燥邪的性质和致病特点之一是()
Fromthesentences"Handinyourpapers."and"Shepaperedtheroomgreen.",wecanseesuchameansofword-formationas_____
女性,55岁。处于慢性肺心病心功能失代偿期,经一段时间治疗后,仍有中度水肿,血钾为2.5mmol/L。该病人可选择以下哪种药物利尿
医院药剂科根据医疗需要与临床医师共同协商制定的处方是
利用了酶反应原理的是
采用熔断器做短路保护时,其熔体额定电流应小于等于明敷绝缘导线长期连续负荷允许载流量的()。
下列关于个人标准信用信息基础数据库信息采集的说法,错误的是()。
同时满足以下两个条件的证券组合:第一,在各种风险相同的条件下,提供最大的预期收益率;第二,在各种预期收益率的水平相同的条件下,提供最小的风险是()
绿色营销应该以()为中心,为消费者提供能有效防止资源浪费、环境污染及损害健康的商品。
Everyyeartelevisionstationsreceivehundredsofcomplaintsabouttheloudnessofadvertisements.However,federalrulesforbi
最新回复
(
0
)