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
42
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
CTScansandLungCancerSmallorslow-growingnodules(小结节)discoveredonalungscanareunlikelytodevelopintotumors
AbecauseoftheirsimilarityBthatwewouldnotbeabletounderstanditatallCtothepopularizationofEnglishasaworld
A.alotofmutualbitternesswillcomeB.highlysubjectiveC.differentlybydifferentpersonsD.keeponmoldingyouE.inac
At80,PeckwasstillvigorousandlivinginParis.
LifeExpectancyintheLastHundredYearsAhundredyearsago,lifeexpectancyindevelopedcountrieswasabout47;inthee
AdifferenttechniquesBsocialrelationshipsandcommunicationClanguageandinformationDseveralcausesworkingtogetherEa
Hundredsofbuildingswerewreckedbytheearthquake.
SingingAlarmsCouldSavetheBlindIfyoucannotsee,youmaynotbeabletofindyourwayoutofaburningbuilding--andtha
TheRoleofPressureGroupsinBritainGeneralElectionsinBritainareusuallyheldonlyonceeveryfiveyears.Governmentsca
随机试题
Thepolicechief,whofearsthatthecasecouldbecomeanationalincident,isopposed______itanypublicity.
我的祖母虽然已经80多岁了,身体却很健康。
下列关于设计总负责的论述中,说法正确的是( )。
下列不属于分散式城市用地布局缺点的是()
生态环境保护与人们的现实经济利益之间往往存在着矛盾。退耕还林、野生动植物保护等方面的政策或措施从长远来看是符合人类利益的,但常常需要牺牲一部分人的现实利益,________。填入横线部分最恰当的是:
一个泥块对陶工说.请把我做成一个陶器,不过请把我做的小一点,这样我盛一点点东西就可以满了。请你谈谈对这个寓言的看法。
某人开车从A镇前往B镇,在前一半路程中,以每小时60千米的速度前进;而在后一半的路程中,以每小时120千米的速度前进。则此人从A镇到达B镇的平均速度是每小时多少千米?()
(2011年第12题)孙子日:“先知者,不可取于鬼神,不可象于事,不可验于度,必取于人,知敌之情者也。”下面说法中,意思与之相近的是:
追诉时效的起算时间为()
Walking—likeswimming,Bicyclingandrunning—isanaerobicexercise,【C1】______buildsthecapacityforenergyoutputandphysica
最新回复
(
0
)