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. All living creatures, especially human beings, have thei
Certainly no creature in the sea is odder than the common sea cucumber. All living creatures, especially human beings, have thei
admin
2012-06-10
36
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 it is: 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-color and 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 motionless 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 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 when 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.
Of all the features of the sea cucumber, which of the following seems to fascinate the author most?
选项
A、What it does when threatened.
B、Where it lives.
C、How it hides from predators.
D、What it eats.
答案
A
解析
定位于最后一段首句“但是有关海参给人留下的最深刻印象是它的防卫方式”,由此可知答案为[A]。
转载请注明原文地址:https://jikaoti.com/ti/KtgMFFFM
0
专业英语四级
相关试题推荐
TheexploitationofthepowerintheSun’sraysisaformofalternativeenergynowshowingnewcommercialpromise.Inthe
Doingyourhomeworkisasurewaytoimproveyourtestscores,andthisisespeciallytrue______itcomestoclassroomtests.
RobertSpring,a19thcenturyforger,wassogoodathisprofessionthathewasabletomakehislivingfor15yearsbyselling
Countrymusicisabout
1LAND,Switzerland,May12-Theworld’scodstockscouldbewipedoutby2020becauseofoverfishing,illegalcatchesandoil
Inourhighlytechnologicalsociety,thenumberofjobsforunskilledworkersis______.
Mostyoungpeopleenjoysomeformofphysicalactivity.Itmaybewalking,cycling,orswimming,orinwinter,skatingorskiing
AidworkersinMozambiquesaytheyareconfidentthat______.
WheredidGabrielaMistralstartherteachingcareer?
TheelderlyRussiansfindithardtoliveontheirstate______.
随机试题
Interestinpursuinginternationalcareershassoaredinrecentyears,enhancedbychronic(长久的)personnelshortagesthatareca
函数y=2χ3+3χ2-12χ+1的单调递减区间是_____。
A.利多卡因B.氯胺酮C.普鲁卡因D.盐酸丁卡因E.氟烷可用于治疗心律失常的药物是
男,30岁,间断性上腹痛10余天,晨起突然呕血400ml,并排柏油便4次,自觉头晕心悸。入院测血压98/60mmHg,心率108次/分,肝脾未触及,肠鸣音亢进,10年前因黄疸性肝炎住院治疗后痊愈。半年前体检示乙肝抗原、抗体检查阴性,丙肝抗体检查阴性,近3年
A.责令改正、给予警告B.追究刑事责任C.吊销负有责任的医疗卫生人员的执业证书D.暂停—年的执业活动E.暂停执业活动六个月到—年实施预防接种的医疗卫生人员未依照期定填写并保存接种记录应()
温经汤证的病机是
患者肛旁肿痛1周,近3天加重,伴发热恶寒,坐卧不宁。检查肛门左侧饱满,高于右侧,压痛明显,有波动感,最可能的诊断是()
固定收益证券不易受到购买力风险的损害。()
(2017年聊城/2016年菏泽)把对集体的管理和对个人的管理结合起来的班级管理方式是()
根据以下资料,回答问题。2010年以来普通高中下降幅度最大与上一年相比下降了:
最新回复
(
0
)