首页
登录
职称英语
Large animals that inhabit the desert have evolved a number of adaptations f
Large animals that inhabit the desert have evolved a number of adaptations f
游客
2024-06-06
3
管理
问题
Large animals that inhabit the desert have evolved a number of adaptations for reducing the effects of extreme heat. One adaptation is to be light in color, and to reflect rather than absorb the Sun’s rays. Desert mammals also depart from the normal mammalian practice of maintaining a constant body temperature. Instead of trying to keep down the body temperature deep inside the body, which would involve the expenditure of water and energy, desert mammals allow their temperatures to rise to what would normally be fever height, and temperatures as high as 46 degrees Celsius have been measured in Grant’s gazelles. The overheated body then cools down during the cold desert night, and indeed the temperature may fall unusually low by dawn, as low as 34 degrees Celsius in the camel. This is an advantage since the heat of the first few hours of daylight is absorbed in warming up the body, and an excessive buildup of heat does not begin until well into the day.
Another strategy of large desert animals is to tolerate the loss of body water to a point that would be fatal for non-adapted animals. The camel can lose up to 30 percent of its body weight as water without harm to itself, whereas human beings die after losing only 12 to 13 percent of their body weight. An equally important adaptation is the ability to replenish (Sheik) this water loss at one drink. Desert animals can drink huge volumes in a short time, and camels have been known to imbibe (吸收) over 100 liters in a few minutes. A very dehydrated person, on the other hand, cannot drink enough water to rehydrate at one session, because the human stomach is not sufficiently big and because a too rapid dilution of the body fluids causes death from water intoxication. The tolerance of water loss is of obvious advantage in the desert, as animals do not have to remain near a water hole but can obtain food from grazing sparse pastures. Desert-adapted mammals have the further ability to feed normally when extremely dehydrated, it is a common experience in people that appetite is lost even under conditions of moderate thirst. [br] What will be fatal to non-adapted animals?
选项
A、Keeping a normal body temperature.
B、Drinking polluted water.
C、Drinking huge volumes of water in a short time.
D、Feeding when dehydrated.
答案
C
解析
文章第二段倒数三句“A very dehydrated person,on the other hand,cannot drink enough water to rehydrate at one session,because the human stomach is not sufficiently big and because a too rapid dilution of the body fluids causes death from water intoxication.”说的是当人在脱水后,因为胃不够大,过快的大量补水会导致体液稀释,然后造成水中毒。.造成死亡就是题干当中的fatal的意思,因此C是符合题意的选择。而A保持正常的体温;B引用受过污染的水;D脱水的时候吃东西这三个选择项都是不符合题 意。因此选A Drinking huge volumes of water in a short time.可以在短时间内引用大量的水是正确答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3622364.html
相关试题推荐
Largeanimalsthatinhabitthedeserthaveevolvedanumberofadaptationsf
Largeanimalsthatinhabitthedeserthaveevolvedanumberofadaptationsf
Anumberoffactorsrelatedtothevoicerevealthepersonalityofthespeak
[originaltext]Chinesecharacters.evolvedfrompicturesandsigns,andthe
[originaltext]Chinesecharacters.evolvedfrompicturesandsigns,andthe
BasicEnglishisEnglishmadesimplebylimitingthenumberofitswordsto
BasicEnglishisEnglishmadesimplebylimitingthenumberofitswordsto
BasicEnglishisEnglishmadesimplebylimitingthenumberofitswordsto
BasicEnglishisEnglishmadesimplebylimitingthenumberofitswordsto
[originaltext]Beesareverysmallanimalswhichflythroughtheairtolook
随机试题
ThehomeserviceindustryinBeijingisexpectedtobecomemoreattractiveb
传播活动经常不是指通过一种媒介开展,往往选择和使用多种媒介,这样就能获得更好的效
由于承包人原因造成某项缺陷或损坏,使某项工程或工程设备不能按原定目标使用而需要再
女性,50岁,上腹痛3月余,2月前钡透为胃窦后壁溃疡,经抗溃疡药物治疗8周曾一过
标准的定义是A.对重复性事物和概念所做的统一规定 B.对唯一性事物和概念所做的
二维码是用某种特定的几何图形按一定规律在乎面(二维方向上)分布的黑白相间的图形记
关于肿瘤抗原和肿瘤标志物说法正确的是A.肿瘤抗原可以是肿瘤标志物,但肿瘤标志物不
评估信度的方法主要包括()。多选A.重测信度 B.内部一致性信度 C.
关于钢筋连接描述正确的是( )。A.当受压钢筋直径大于25mm时不宜采用绑扎搭
咽结合膜热是由以下哪一类病毒引起A.腺病毒 B.单纯疱疹病毒 C.埃可病毒
最新回复
(
0
)