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
71
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、weak
B、little
C、few
D、great
答案
D
解析
这里主要谈动物链的平衡问题,鲨鱼吃掉其他的鱼,共他鱼的数量就不会太多。其他几个选项的意思不符合上下文。
转载请注明原文地址:https://kaotiyun.com/show/SCLd777K
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
CellPhones:HangUporKeepTalking?Millionsofpeopleareusingcellphonestoday.Inmanyplacesitisactuallyconsider
AnimalshaveRightsRulingoutTheirUseinResearch?Toparaphrase18th-centurystatesmanEdmundBurke,"allthatisneed
WhatistheresearchatJohnsHopkinsUniversityabout?WhichofthestatementsisNOTtrueaccordingtothesecondparagraph?
A.alotofmutualbitternesswillcomeB.highlysubjectiveC.differentlybydifferentpersonsD.keeponmoldingyouE.inac
ScientistsDevelopWaysofDetectingHeartAttackGermanresearchershavecomeupwithanewgenerationofdefibrillators(除颤
Thetowerremainsintactevenaftertwohundredyears.
DNAFingerprintingDNAisthegeneticmaterialfoundwithinthecellnucleiofalllivingthings.Inmammalsthestrandsof
KnittingMymotherknewhowtoknit(编织),butshenevertaughtme.Sheassumed,asdidmanywomenofhergeneration,thatkni
Farmers’MarketsCharlotteHollinsknowsshefacesabattle.The23-year-oldBritishfarmerandher21-year-oldbrotherBen
Inaworldinwhichhungerremainsprevalent,machinesandorganizationsholdthekeytoproducingmorefoodanddistributingit
随机试题
某生物制药公司年销售净额280万元,息税前利润80万元,固定成本32万元,变动成本总额168万元,资产总额200万元,负债资本比率为40%,综合债务利率为12%,公司的所得税税率为33%。预计3年后,公司的资产总额达到1000万元,负债率会提高到60
缺乏叶酸的乳品是
急性心肌梗死时,最先恢复正常的酶是
投标人在研究合同条件时,应核准的日期和时间包括()。
丁老师(中国居民)2012年1月取得以下收入:①月工资薪金9000元。②国债到期,取得利息收入3500元。③编写教材一本,取得一次性稿酬8000元。④出租商铺,每月租金6000元。⑤参加某专业学术性报告,取得一次性劳务报酬3000元。要求:根据
根据《中华人民共和国教师法》的规定,对教师的考核内容不包括()。
对下列句中加下划线的字的理解正确的是()。
教育的社会流动功能在当代的重要意义有哪些?
文小雨加入了学校的旅游社团组织,正在参与组织暑期到台湾日月潭的夏令营活动,现在需要制作一份关于日月潭的演示文稿。根据以下要求,并参考“参考图片.docx”文件中的样例效果,完成演示文稿的制作。在第6张幻灯片的右上角,插入考生文件夹下的“图片5.gif”
Mr.MikeSmith:Itwasn’taneasydecision,butwe’vebeenaskingforadecentwageforyears.Nowatlastpeoplearebegin
最新回复
(
0
)