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
Certainly no creature in the sea is odder than the common sea cucumber(海参). All living creatures, especially human beings, have
Certainly no creature in the sea is odder than the common sea cucumber(海参). All living creatures, especially human beings, have
admin
2009-06-15
77
问题
Certainly no creature in the sea is odder than the common sea cucumber(海参). All living creatures, especially human beings, have their peculiarities, but everything about the little sea cucumber seems unusual. What else can be said about an odd 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 hut is considered supremely edible by gourmets(美食家) ?
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 sandcolor and nearly white. One form even had vivid purple tentacles. Usually the creatures are cucumbers-shaped——hence their name——and because they are typically rock inhabitants, this shape, combined with flexibility, enables them to squeeze into narrow cracks 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 inactive 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排除内脏) and regenerate itself if it is attacked or even touched; it will do the same if the surrounding water temperature is too high or if the water becomes too polluted.
选项
A、the reason for the sea cucumber’s name
B、ways to identify the sea cucumber
C、places where the sea cucumber can be found
D、the peculiarities that make the sea cucumber unusual
答案
D
解析
本文的主题句是第一段第一句:毫无疑问,没有哪一种海洋动物能比常见的海参更为奇特的了。文章的其余部分均是围绕这句话而展开的,说明海参的种种奇特之处。
转载请注明原文地址:https://kaotiyun.com/show/NmLd777K
本试题收录于:
职称英语理工类A级题库职称英语分类
0
职称英语理工类A级
职称英语
相关试题推荐
ASpecialClockEverylivingthinghaswhatscientistscallabiologicalclockthatcontrolsbehavior.Thebiologicalclock(5
ASpecialClockEverylivingthinghaswhatscientistscallabiologicalclockthatcontrolsbehavior.Thebiologicalclock(5
TheboysoldgoodsfromdoortodoorbecauseDr.Kellygavespecialattentiontothecasemainlybecause
InitiallythewriterdidnotwanttobuyahearingaidbecauseWhichofthefollowingisNOTtrueofCrystalEar?
Howmanydiseasesareknowntoattackwheat?Accordingtothepassage,someplantdiseasescanbepreventedby______.
WhichofthefollowingstatementswouldBowlbysupport?Whichofthefollowingbestexpressesthewriter’sattitudetowardsear
SleeplessnessInsomniaorsleeplessnessisacommoncomplaintofwomenastheyenterintomenopause.Insomniameanshavingt
SleepSleepispartofaperson’sdailyactivitycycle.Thereareseveraldifferentstagesofsleep,andtheytoooccurinc
A.beforethecancercellsspreadelsewhereB.themorechancesofdyingofX-rayradiationhewillhaveC.whatismostrespons
KnittingMymotherknewhowtoknit(编织),butshenevertaughtme.Sheassumed,asdidmanywomenofhergeneration,thatkni
随机试题
患儿女,7岁。上中切牙之间间隙达4~5mm,最不可能的原因是
某市一工厂位于市区内,因生产不景气,经总公司批准,同意改建一座高层宾馆,占地面积3.2hm2。总公司在批准时指出:市委、市规划行政主管部门根据规划,经研究并口头同意该厂用地使用性质可以调整。随后该厂便与合作方签订协议,由合作方出资建成以后各得一半的建筑面积
燃具与燃气管道宜采用硬管连接,燃气用软管应采用( )橡胶管。
常用的市场风险限额包括()。
国家旅游局制定的旅游安全管理暂行办法第五条规定,旅游安全管理的原则是()。
在实际的教学过程中,教师通常会在一门课程结束后进行考试或测验,以评价学生对知识和技能的掌握程度。这种评价方式被称为()。
下列选项中,有权制定地方性法规的是()。
设f(x)在[0,1]上二阶可导,且|f"(x)|≤1(x∈[0,1]),又f(0)=f(1),证明:|f’(x)|≤1/2(x∈[0,1]).
ScientistshavelongbeeninterestedinhowthedeafprocesssignedlanguagesinthebraiaUnderstandingthatactivitycouldsh
A、Heispraisedbyhisteacher.B、Hegetsapayrise.C、Heispromoted.D、Hegetsanewbook.C对话中,女士对男士的晋升表示祝贺,男士对此表示感谢,并说自己感觉压
最新回复
(
0
)