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
67
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、mental
B、hunting
C、social
D、swimming
答案
B
解析
空白处提到鲨鱼吃各种受伤的或死的鱼,所以才引出鲨鱼的"hunting activities",即鲨鱼的寻猎行为。
转载请注明原文地址:https://kaotiyun.com/show/vCLd777K
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
HeatandHealthExtremelyhotweatheriscommoninmanypartsoftheworld.Althoughhotweatherjustmakesmostpeoplehot,
CTScansandLungCancerSmallorslow-growingnodules(小结节)discoveredonalungscanareunlikelytodevelopintotumors
AdifferenttechniquesBsocialrelationshipsandcommunicationClanguageandinformationDseveralcausesworkingtogetherEa
WhichofthefollowingisNOTtrueofwhatismentionedaboutthewingedrobotinthesecondparagraph?Howdidtherobotbehav
WhichofthefollowingstatementsisNOTtrueoftheJapaneseconceptcar?AccordingtoDoi,
WhichofthefollowingstatementsisNOTtrueoftheJapaneseconceptcar?WhatisthefunctionofthecameramentionedinPara
Whydoyoungfemalechimpslearnfasterthanyoungmalechirnpsatfishingfortermites?Whatarethetoolswithwhichchimpsf
Shewasapuzzle
Theeternalmotionofthestarsfascinatedhim.
Itisverydifficultforachildtoadheretorules.
随机试题
可的松滴眼液在使用过程中会有损失,其主要原因是()。
赵林、赵祺诉赵恒继承遗产纠纷一案,赵永以有独立请求权第三人的身份参加诉讼。一审法院依法作了判决,在向当事人送达判决时,赵林当场口头表示不上诉,但在上诉期内又向一审法院提交了上诉状;赵祺当场口头表示上诉,但在上诉期内未提交上诉状;赵恒当场口头表示上诉,但在上
[2010年,第57题]图4.10-2示均质圆轮,质量为m,半径为r,在铅垂图面内绕通过圆盘中心O的水平轴转动,角速度为ω,角加速度为α,此时将圆轮的惯性力系向O点简化,其惯性力主矢和惯性力主矩的大小分别为()。
下列关于公司型股权投资基金应纳税所得额的说法中,正确的是()。
小宋2020年2月以个人名义购入境内上市公司股票,同年11月出售,持有期间取得股息10万元;从境内非上市公司取得股息20万元。计算小宋股息所得应缴纳个人所得税税额的下列算式中,正确的是()。
一般意义上的多媒体教学是指狭义的。()
AftervisitingWidenerUniversityandlearningaboutitsprogramrequiring300hoursofcommunityserviceinthesurroundingpoo
AstudyofhowolderteenagersusesocialmediahasfoundthatFacebookis"notjustontheslide,itisbasicallydeadandburi
TheresultsofthenewfreetradebetweentheU.S.andSouthKoreaareallthefollowingEXCEPTthat
Bacteriaaresometimes_____toosmalltobeseenwithoutamicroscope.
最新回复
(
0
)