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
2024-10-02
18
管理
问题
Certainly no creature in the sea is odder than the common sea cucumber. All living creature, 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 fiats. 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-color 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 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 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 l it will do the same if the surrounding water temperature is too high or if the water becomes too polluted. [br] According to the passage, why is the shape of sea cucumbers important?
选项
A、h helps them to digest their food.
B、It helps them to protect themselves from danger.
C、It makes it easier for them to move through the mud.
D、It makes them attractive to fish.
答案
B
解析
通过阅读文章可以排除选项A、C、D,因为文中没有提及,故选项B为正确答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3783389.html
相关试题推荐
Certainlynocreatureintheseaisodderthanthecommonseacucumber.All
Certainlynocreatureintheseaisodderthanthecommonseacucumber.All
WhatdidThomasEdison,HenryFordandAlbertEinsteinhaveincommonwhenthey
TheChinesefilmsuperstaroncesaidthathe______rememberedasacommonperso
ThenoisethataffectsseacreaturesconiesfromthefollowingEXCEPT[br][ori
ThenoisethataffectsseacreaturesconiesfromthefollowingEXCEPT[br][ori
ThenoisethataffectsseacreaturesconiesfromthefollowingEXCEPT[originalt
WhatiscommontoallthefilmsproducedinHollywood?[br][originaltext]
WhatiscommontoallthefilmsproducedinHollywood?[originaltext]Hollyw
Theinstinct,commonamongpeopleofallages,forkeepingapparentlyusele
随机试题
[originaltext]AmericanIndiansgrewandsmokedtobaccobeforeColumbuscame
Ideasabout"spoiling"childrenhavealwaysinvolvedconsiderationofjustw
[originaltext]It’ssunnytoday.Whynotgooutforapicnic?[/originaltext][or
Whileitseemsprettyobviousthatgratitudeisapositiveemotion,psycholo
公文处理工作应当坚持的原则有()。A.实事求是 B.安全保密 C.精
新药上市后在广泛使用条件下考察疗效和不良反应,尤其是罕见不良反应是在新药临床试验
1958年提出的社会主义建设总路线的缺点是( ) A.高指标 B.多、快、
中国证监会于2008年3月制定了《证券发行上市保荐业务工作底稿指引》,要求保荐机
A.海金沙 B.儿茶 C.芦荟 D.冰片 E.青黛具不愉快的臭气,味极苦
财政部门履行的会计行政管理职能主要有()。A、会计准则制度及相关准则规范的制定和
最新回复
(
0
)