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
A、The cold, dark living environment. B、The incompressibility of water. C、The removal of the habitat. D、The high density of water
A、The cold, dark living environment. B、The incompressibility of water. C、The removal of the habitat. D、The high density of water
admin
2013-10-14
72
问题
To us, the environment in which fish dwell often seems cold, dark and mysterious. But there are advantages of living in water.[1]And they’ve played an important role in making fish what they are.
One is that water isn’t subject to sudden temperature changes. Therefore it makes an excellent habitat for a cold-blooded animal. Another advantage is the water’s ability to easily support body weight.[2]Fish has approximately the same density as water. So a fish in water is almost weightless. This weightlessness in turn means two things: one is a fish can get along with a light weight and a simple bone structure; the other is limitations to a fish’s size are practically removed. Yet there’s one basic difficulty in living in water — the fact that it is incompressible. For a fish to move through water, it must actually shove water aside. Most can do this by wiggling back and forth in snake-like motion. The fish pushes water aside by the forward motion of its head and with a curve of its body and its flexible tail. Next the water flows back along the fish’s narrowing size, closing in at the tail and helping the fish propel itself forward.
The fact that water is incompressible has literally shaped the development of fish. A flat and angular shape can be moved through water only with difficulty. And for this reason, fish have a basic shape that is beautifully adapted to deal with this peculiarity.
1. What is the passage mainly about?
2.What does fish have in common with water, according to the passage?
3. What shaped the development of fish?
选项
A、The cold, dark living environment.
B、The incompressibility of water.
C、The removal of the habitat.
D、The high density of water.
答案
B
解析
细节题。短文最后提到,水的不可压缩性(water is incompressible)决定了鱼进化的形状,故答案为[B]。
转载请注明原文地址:https://kaotiyun.com/show/uV27777K
0
大学英语六级
相关试题推荐
Theword"premise"(Para.1)probablymeans"______".Companiesdon’twanttospendmoneyonresearchindevelopingappropriate
Whentheearthwasborntherewasnoocean.Thegraduallycoolingearthwasenvelopedinheavylayersofcloud,which【C1】______
Modempeoplewearmanymasksthatkeeptheirrealityconfinedand【C1】______,eventothemselves.Thepossibilityofencounterin
Personalityistoalargeextentinherent—AtypeparentsusuallybringaboutAtype【B1】______Buttheenvironmentmustalsoha
Thegeographicallocationofacountryanditsphysical【C1】______areveryimportanttoitsdevelopmentandprogress.TheUnited
Thegeographicallocationofacountryanditsphysical【C1】______areveryimportanttoitsdevelopmentandprogress.TheUnited
TheAmericanideaofrespectinghumanrightscamefromseveralsources.First,thecolonistshadbeen【B1】______.oftheirright
A、Shedidn’tknowherdaughtercouldsingsowell.B、Shethinksthatshesingsbetterthanherdaughter.C、Shedoesn’tlikeher
A、Peter’sjobisveryattractive.B、ThemancanhelpPetertohaveabetterjob.C、HeistiredofwaitingforPeterthere.D、The
A、Hehasmanycreditcards.B、Hedidn’tconsultthewomanbefore.C、Hepaysmoreattentiontotheaccounts.D、Hepayslittleatt
随机试题
排卵型功血的发病机制中,下列说法不正确的是()
关于头痛所提示的先兆症状A、脑血管意外的可能B、脑膜炎C、脑出血D、内脏出血E、脑肿瘤早晨头痛,且由咳嗽和打喷嚏引起则可能是
我国目前有偿出让和转让土地的价格主要是()。
FIDIC分包合同中,承包商以自己的名义就分包商的合理索赔要求向工程师递交索赔报告的事件可能是( )。
建设工程索赔的起因是()。
根据《工程建设项目施工招标投标办法》(国家八部委局第30号令),当投标人投标文件中出现用数字表示的数额与用文字表示的数额不一致时,除招标文件另有约定外,以()为准,调整后的报价经投标人确认后产生约束力。
网络购物:在线支付:货到付款
(2011年真题)下列法学家中,把法律比作语言和风俗,主张法是民族精神之体现的是()。
=______.
子模式是用户与数据库的接口之一,它对应于数据库的(30)。
最新回复
(
0
)