A. our share of resources B. a biological creature C. a given area D. the maintenance of the ecosystem E. the source of food F.

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问题 A. our share of resources B. a biological creature
C. a given area D. the maintenance of the ecosystem
E. the source of food F. various species
In an ecosystem, plants, animals and humans live together in______.

选项

答案C

解析根据第一段第一句话“An ecosystem is where living creatures expand within a given area．”可知，生态系统就是所有生物在一个给定区域共存，所以本题选C。

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本试题收录于：职称英语理工类C级题库职称英语分类

职称英语理工类C级

职称英语

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A. our share of resources B. a biological creature C. a given area D. the maintenance of the ecosystem E. the source of food F.

职称英语理工类C级

职称英语

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Intherecentpast,medicalresearchershaveshownthatheartdiseaseisassociatedwithcertainfactorsinourday-to-daylives

A.ifthereisn’tenoughdopamineinyourbodyB.whataffectsmusclesallthroughyourbodyC.whichcannotbecuredyetD.

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Researchindicatesthatover81%ofteachersaredissatisfiedwiththeirsalary.

Iperceivedanoteofunhappinessinhervoice.

9.Itisabsurdtogooutinsuchterribleweather.

In1861itseemedinevitablethatthesouthernstateswouldbreakawayfromtheUnion.

MediaandCurrentEventsThemediacanimpactcurrentevents.AsagraduatestudentatBerkeleyinthe1960s,Iremembere

TheEnglishfirstattemptedtosettleinMaineatthemouthoftheKennebecRiverin1607.

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