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
2016-07-17
34
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 frequendy. But these fish perform a【C2】______service for earth’s watersand for human beings. Yet business and sport fishing are threatening their【C3】______. Somesharks are at【C4】______of disappearing from earth.
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. Thatis 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 plantsthat live in the ocean.
Medical researchers want to learn more about the shark’s body defense and immune systems【C12】______ disease.Researchers know that sharks【C13】______quickly from injuries. Theystudy 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. Theirhunting 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,能嗅到海水中存在的极为微量的气味。作者举了三个物质:血、体液和化学品。空格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/g1Gd777K
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
LookingtotheFuture—2040Doyouforgettoturnoffthelightsandheaterswhenyougooutofaroom?In2040itwillnot
LookingtotheFuture—2040Doyouforgettoturnoffthelightsandheaterswhenyougooutofaroom?In2040itwillnot
VibratingRubberCellphonesVibratingrubbercellphonescouldbethenextbigthinginmobilecommunications.Theyallowpe
A.Keprike’sresearchtoolB.DangersofHabitualshortagesofsleepC.CriticismonKripke’sreportD.Awayofovercominginso
FalseFearofBigFishManypeoplebelievesharks(鲨鱼)aredangerousandwillalwaystrytohurtorevenkillhumans.(46).As
CaribbeanIslandsWhatwouldyouseeifyoutookacruisetotheCaribbeanIslands?Palmtreesandcoconuts(椰子)?Whitebeaches
PuertoRicanCuisine(菜肴)PuertoRico,aCaribbean(加勒比海区)islandrichinhistoryandremarkablenaturalbeauty,hasacuisine
PleaseFastenYourSeatbeltsSevereturbulence(湍流)cankillaircraftpassengers.Now,intestflightsovertheRockyMountain
Hisclaimsseemcredibletomanypeople.
Thechairman(proposed)thatwestopthemeeting.
随机试题
足月儿,出生时羊水粪染,全身皮肤青紫,心率90次/分,弹足底皱眉,四肢略屈曲,无呼吸。针对上述表现,下列哪项治疗措施不妥当
建筑安装工程的单位工程是具备独立施工条件并能形成独立()的建筑物及构筑物。
A.浸润性肺TBB.慢性纤维空洞型肺TBC.血行播散型肺TBD.结核性胸膜炎E.原发型肺结核有胸郭塌陷,纵隔、气管向病侧移位的是()
应付压力引起的情感变化首先是
签名效应是指当人们在纸上写出自己名字时,头脑中的自我意识会加强,此时看到喜欢的东西,更容易把物品和自己联系起来,产生“这个东西真适合我”等;想法,从而激发购买欲望。 根据上述定义,下列现象可用签名效应解释的是()。
税收:调节:差距()
影响经济主体对货币需求量的主要因素有()。
遗传素质
问题解决过程中使用的启发式策略不包括()。
FacingtheEnemiesWithinWearenotbornwithcourage,butneitherarewebornwithfear.Maybesomeofyourfearsarebrou
最新回复
(
0
)