首页
登录
职称英语
Certainly no creature in the sea is odder than the common sea cucumber. All
Certainly no creature in the sea is odder than the common sea cucumber. All
游客
2025-04-05
25
管理
问题
Certainly no creature in the sea is odder than the common sea cucumber. All living creatures, especially human beings, have their peculiarities, but everything about the little sea cucumber seems unusual. What else can be said about a bizarre animal that among other eccentricities, eats mud, feeds almost continuously day and night but can live without eating for long periods, and can be poisonous but is considered supremely edible by gourmets?
For some fifty million years, despite all its eccentricities, the sea cucumber has subsisted on its diet of mud. It is adaptable enough to live attached to rocks by its tube feet, under rocks in shallow water, or on the surface of mud flats. Common in cool water on both Atlantic and Pacific shores, it has the ability to suck up mud or sand and digest whatever nutrients are present.
Sea cucumbers come in a variety of colors, ranging from black to reddish-brown to sand-colored and nearly white. One form even has vivid purple tentacles. Usually the creatures are cucumber-shaped—hence their name and because they are typically rock inhabitants, this shape, combined with their flexibility, enables them to squeeze into crevices where they are safe from predators and ocean currents.
Although they have voracious appetites, eating day and night, sea cucumbers have the capacity to become quiescent and live at a low metabolic rate—feeding sparingly or not at all for long periods, so that the marine organisms that provide their food have a chance to multiply. If it were not for this faculty, they would devour all the food available in a short time and would probably starve themselves out of existence.
But the most spectacular thing about the sea cucumber is the way it defends itself. Its major enemies are fish and crabs. When attacked, it squirts all its internal organs into the water. It also casts off attached structures such as tentacles. The sea cucumber will eviscerate and regenerate itself if it is attacked or even touched: it will do the same if the surrounding water temperature is too high or the water becomes too polluted. [br] According to the passage, why is the shape of sea cucumber important?
选项
A、Because it helps them digest food.
B、Because it helps them protect themselves from danger.
C、Because it makes it easier for them to move through mud.
D、Because it makes them attractive to fish.
答案
B
解析
题目问:海参的形状为什么重要?第三段…this shape,combined with their flexibility,enables them to squeeze into crevices where they are safe from predators and ocean currents.通过这句话可知,海参的外形,以及它们的灵活性,能够让它们钻进裂缝以躲避天敌和洋流。据此判断,应选择B。
转载请注明原文地址:https://tihaiku.com/zcyy/4027296.html
相关试题推荐
Certainlymanmust______thefuture,andfindwaysofprovidingforhisuse.A、loo
Whatdotheextraordinarilysuccessfulcompanieshaveincommon?Tofindout
Whatdotheextraordinarilysuccessfulcompanieshaveincommon?Tofindout
Certainlynocreatureintheseaisodderthanthecommonseacucumber.All
Certainlynocreatureintheseaisodderthanthecommonseacucumber.All
Awonderdrugwas______fromthiscommonherbasacuretorcancer.(2007年中国矿业大学考
Theboyhadcertainlydonewrong,buthisfathermade______forhisyouth.A、all
Whiteisthe______colorofaweddinggown.A、normalB、ordinaryC、commonD、conven
Asoneoftheyoungestprofessorsintheuniversity,MissKingiscertainlyont
Therepublicationofthepoet’smostrecentworkswillcertainly______hisnatio
随机试题
[img]2019m11x/ct_epekm_epelist_0401_201910[/img][br][originaltext]I’dliket
[audioFiles]2017m2x/audio_ezfm_029_201702[/audioFiles]MP3PlayersDespi
Thebookgivesyouagood______ofwhatlifewaslikeinJapaninthe19thcentur
除机关、团体、事业单位的其他单位应当至少()进行一次防火检查。A.每月 B
实践中常用查全率和查准率来衡量专利检索的效果。而查全率常用来衡量检索的( )。
最常见于风湿性二尖瓣狭窄患者的心律失常是A.房性早搏 B.心房颤动 C.窦性
崔颢的《黄鹤楼》与李白的《登金陵凤凰台》两首诗谁高谁下,历代文人纷争不已,但见仁
下列说法中,正确的是( )。A.大赦既赦其刑,又赦其罪B.特赦只赦其刑
32,8,4,1,12,()。A.2 B.3 C.4 D.11
女,55岁,厌食、乏力3个月,无痛性进行性黄疸1个月,体重明显减轻。查体:皮肤及
最新回复
(
0
)