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
Sharks Perform a Service for Earth’s Waters It is hard to get people to think of sharks as anything but a deadly enemy. They
Sharks Perform a Service for Earth’s Waters It is hard to get people to think of sharks as anything but a deadly enemy. They
admin
2010-01-16
75
问题
Sharks Perform a Service for Earth’s Waters
It is hard to get people to think of sharks as anything but a deadly enemy. They are thought to 【51】______ people frequently. Although these fish perform a valuable 【52】______ for earth’s waters and for human beings, business and sport fishing are threatening their 【53】______. As a result, some sharks are at risk of disappearing from Earth.
Warm weather may influence both fish and shark 【54】______. Many fish swim near coastal areas because of their 【55】______ waters. Experts say sharks may follow the fish into the same areas, 【56】______ people also swim. In fact, most sharks do not purposely charge at or bite humans. They are thought to mistake a person 【57】______ a sea animal, such as a seal(海豹) or sea lion. That is why people should not swim in the ocean when the sun goes down or comes up, because those are the times when sharks are looking for 【58】______. Experts also say that bright colors and shiny jewelry(珠宝) may cause sharks to attack.
A shark has an extremely good sense of 【59】______, with which it can find small amounts of substances in water, such as blood, body liquids and chemicals 【60】______ by animals. These powerful senses help sharks find their food. Sharks eat fish, any 【61】______ sharks, and plants that live in the ocean.
Medical researchers want to learn more about the shark’s body defense and immune(免疫的) 【62】______ against disease. Researchers know that sharks 【63】______ quickly from injuries. They study the shark in hopes of finding a way to fight human disease.
Sharks are important for the world’s oceans, as they eat injured and diseased fish. Their 【64】______ activities mean that the numbers of other fish in ocean waters do not become too 【65】______. This protects the plants and other forms of life that exist in the oceans.
选项
A、food
B、help
C、friends
D、trainers
答案
A
解析
根据上下文,这里的意思是鲨鱼寻找食物,所以答案应为"food"。
转载请注明原文地址:https://kaotiyun.com/show/aCLd777K
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
Nationalforestsmakemoneyforthegovernmentthroughthesaleoftreesforlumber.
OneGoodReasontoLetSmallpoxLiveIt’snowafairbetthatwewillneverseethetotalextinctionofthesmallpoxvirus.
A.alotofmutualbitternesswillcomeB.highlysubjectiveC.differentlybydifferentpersonsD.keeponmoldingyouE.inac
ListeningtoBirdsongAmalezebrafinchchirpsawaytohimself.Suddenlyhenoticesafemalebirdnearby.Herealizesheha
Attheageof30,Herseysuddenlybecameacelebrity.
AdifferenttechniquesBsocialrelationshipsandcommunicationClanguageandinformationDseveralcausesworkingtogetherEa
Whydoyoungfemalechimpslearnfasterthanyoungmalechirnpsatfishingfortermites?Howdidtheresearchersexplainthefa
Jackpackedupallthethingshehadaccumulatedoverthe(last)tenyears.
Whycan’tyoustopyour(eternal)complaining?
Almostalleconomistsagreethatnationsgainbytradingwith.oneanother.
随机试题
应用下列哪些方法可以分离汉防己甲素和汉防己乙素
影响味觉的因素中不包括()。
房源信息公盘制的作用主要有()。
优点是水位波动振幅小衰减快,需要调压室的容积小,且引水系统与其接头处的水头损失小;缺点是反射水击波的效果较差的调压室是()。
在工程索赔中,工地的交接记录()。
如果某类凭证要求必须在贷方出现某一科目,应该选择()限制类型的凭证。
原始凭证金额有错误的,如果是小写金额的错误,应按照“划线更正法”予以更正,并且签章。若是大写金额有错误的,应当由出具单位重开,不得在原始凭证上更正。()
只取得金融期货经纪业务资格的期货公司,可以向期货交易所申请非结算会员资格。( )
甲公司为有限责任公司。根据公司法律制度的规定,下列各项中,属于甲公司解散事由的有( )。
OnlywhenIreachedmythirties______(我才意识到读书是不能被忽视的).
最新回复
(
0
)