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
2013-08-28
40
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【C1】______people frequently. But these fish perform a【C2】______service for earth’s waters and for human beings. Yet business and sport fishing are threatening their【C3】______Some sharks are at risk of disappearing from【C4】______.
Warm weather may influence both fish and shark activity. Many fish swim near coastal areas【C5】______their warm waters. Experts say sharks may follow the fish into the same areas,【C6】______people also swim. In fact, most sharks do not purposely charge at or bite humans. They are thought to mistake a person【C7】______a sea animal, such as a seal or sea lion. That is why people should not swim in the ocean when the sun goes down or comes up. Those are the【C8】______when sharks are looking for food. Experts also say that bright colors and shiny jewelry may cause sharks to attack.
A shark has an extremely good sense of smell. It can find small amounts of substances in water, such as blood, body liquids and【C9】______produced by animals. These powerful【C10】______help sharks find their food. Sharks eat fish, any【C11】______sharks, and plants that live in the ocean.
Medical researchers want to learn more about the shark’s body defense and immune【C12】______against disease. Researchers know that sharks【C13】______quickly from injuries. They study the shark in hopes of finding a way to fight human disease.
Sharks are important for the world’s【C14】______They eat injured and diseased fish.
Their hunting activities mean that the numbers of other fish in ocean waters do not become too【C15】______. This protects the plants and other forms of life that exist in the oceans.
【C9】
选项
A、sciences
B、mathematics
C、chemicals
D、physics
答案
C
解析
本段第一、二句是说,鲨鱼的嗅觉特别灵敏,能发现海水中存在的微量物质。作者列举了三种物质:血、体液和化学品。空白处要填入表示物质的名词。四个选项中唯一表达物质的词是chemicals:化学品。所以chemicals是答案,而其他三个选项与学科有关,脱离了上下文的意思,不是本题的答案。
转载请注明原文地址:https://kaotiyun.com/show/TZLd777K
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
Accordingtothepassage,howcanyoulearnthatmanypeopleareuneasyaboutinformationtechnology?Thewritergivestheexam
LifetimeemploymentintheJapanesecompanyperhapsmeansthattheemployeecanmakeseriousmistakesinwork.TheJapanesecom
LifetimeemploymentintheJapanesecompanyperhapsmeansthattheemployeecanmakeseriousmistakesinwork.Lifetimeemploym
Psychologistsaredividedwithregardtotheirattitudestoward______.Whichofthefollowingcanbestraisestudents’creativ
In1861itseemedinevitablethatthesouthernstateswouldbreakawayfromtheUnion.
Whenvisitingmuseumsnowadays,peoplecantakepartinmanyactivities.Peoplecanaffordtogotthemodernmuseumssincethey
LEDLighting1AnaccidentaldiscoveryannouncedrecentlyhastakenLEDlightingtoanewlevel,suggestingitcouldsoonoffer
Whenwevisitedthecountry,ourprincipalimpressionwasoneofpovertyandhardship.
Youdon’tneedtocarrylargeamountsofcash;actuallyallfinancialbusinesswillbeconductedbycomputers.
LookingtotheFutureWhenamagazineforhigh-schoolstudentsaskeditsreaderswhatlifewouldbelikeintwentyyears,t
随机试题
A.南葶苈子B.菟丝子C.酸枣仁D.北葶苈子E.沙苑子播娘蒿的干燥成熟种子是
Onedayapoliceofficermanagertogetsomefreshmushrooms.Hewasso【C1】______whathehadboughtthatheofferedto【C2】______
丸剂中有金石,贝壳类药物,为防止质重伤胃,多选用
男,5个月,经常吐奶,24小时食管pH监测诊断为胃食管反流,治疗哪项不恰当
风管及部件的()与材质应符合施工验收规范规定。
某建设工程施工合同签订于2008年3月2日,合同约定工程开、竣工日期分别为2008年3月10日和2009年10月1日;后工程于2009年10月15日竣工验收合格,现承包人欲行使工程价款优先受偿权,其最迟必须在()前行使。
甲上市公司2020年12月31日的股本为1000万股,面值1元,资本公积(股本溢价)100万元,盈余公积300万元,假定甲公司回购股票200万股,回购价格为每股2元,则注销库存股时冲减盈余公积()万元。
【2016河南郑州】耶克斯一多德森定律表明,各种活动都具有最佳动机水平,而且动机最佳水平随任务难度的不同而有差异,具体表现为()。
下列关于社会主义初级阶段的含义表述正确的是()。
原型化方法的系统建造过程支持系统的重用,它是系统高效开发和质量保证的有效途径,但实现重用的基本要求则是要有()。
最新回复
(
0
)