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、They are polluted at the same time. B、They have the same temperature. C、They have the same density. D、They are both great trea
A、They are polluted at the same time. B、They have the same temperature. C、They have the same density. D、They are both great trea
admin
2013-10-14
47
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、They are polluted at the same time.
B、They have the same temperature.
C、They have the same density.
D、They are both great treasure to humans.
答案
C
解析
细节题。文中提到,正是由于鱼有着与水相同的密度(Fish has approximately the same density as water),所以鱼在水中几乎是没有重量的(weightless),故答案为[C]。
转载请注明原文地址:https://kaotiyun.com/show/rV27777K
0
大学英语六级
相关试题推荐
Ahappymarriageapparentlyisgoodmedicine,buthostilespousesmaybeharmfultooneanother’shealth.Couplesin【B1】______
Modempeoplewearmanymasksthatkeeptheirrealityconfinedand【C1】______,eventothemselves.Thepossibilityofencounterin
Modempeoplewearmanymasksthatkeeptheirrealityconfinedand【C1】______,eventothemselves.Thepossibilityofencounterin
Personalityistoalargeextentinherent—AtypeparentsusuallybringaboutAtype【B1】______Buttheenvironmentmustalsoha
WomenmaybeinfectedbytheHIVvirusinadifferentwaythanmen,accordingtoarecentstudyrelease,suggestingitcouldbe
A、It’shelpfultohispersonaldevelopment.B、It’sawayofshowinghisrespecttotheNBA.C、It’ssomethingheshoulddoforhi
Itiscommonlyheldthatdrinkingmoderateamountsofalcoholcanreducetheoddsofhavingadeadlyheartattack.More【B1】_____
A、Growscolderastheblubberaccumulates.B、Remainsthesame.C、Variesaccordingtothewatertemperature.D、Growswarmerasth
WhattoDoDuringUnemploymentEvenastheeconomyimproves,ajoblesspersonmayfaceuptoayearormoreofunemployment.
A、Creatingspeciallanguage.B、Sellingavarietyofproducts.C、Providingacomfortableenvironment.D、Openingstoresinbusyar
随机试题
Ifyoustarteachdaydesperatelywishingforanextrahourinbed,thefollowingislikelytoleaveyoufeelingevenmorebad-t
胃肠湿热呕吐,宜选用
某时间某炼油厂油品分厂罐区发生爆炸,引起310号油罐燃烧,造成2人死亡,直接经济损失约39万元。事故当日13时许,某炼油厂油品分厂半成品车间工人黄某在当班期间,发现310号油罐油面高度已达14.21m,接近警戒高度14.30m。黄某马上向该厂总调度做了
下列各项中,免征印花税的有()。
甲公司和乙公司均为增值税一般纳税人,适用的增值税税率为17%。2016年3月,甲公司以其持有的10000股丙公司股票(作为交易性金融资产核算)交换乙公司生产的一台办公设备,并将换入办公设备作为固定资产核算。甲公司所持有丙公司股票的成本为180万元,累计确认
外国投资者计划用外商投资企业的利润进行再投资申请被国家有关部门批准时,该再投资的利润已经实现的,在实际再投资时,不论是一次或分期投资,均可以按照规定给予再投资退税。()
“三庭五眼”指的是人物画中面部五官所在的位置()。
受质量技术监督行政部门受质量技术监督行政部门委托行政处罚的组织的要求是()。
A.ThankyouforthelessoninartappreciationB.ItleavesmecoolC.Icantellthedifferencebetweenanetchingandalitho
A、higherthan1995to2000B、lowerthan1973to1995C、asgoodas1995to2000D、thesameas1993to1995B
最新回复
(
0
)