The word "threatened" in the first sentence of the first paragraph could be best replaced by Why do researchers estimate elepha

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问题 The word "threatened" in the first sentence of the first paragraph could be best replaced by
Why do researchers estimate elephant numbers in an area by counting dung piles?

选项 A、Because elephants are difficult to catch.
B、Because it is not possible to count elephants from a plane.
C、Because it is not possible to keep track of elephants.
D、Because elephants are shy animals.

答案B

解析

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本试题收录于：职称英语综合类A级题库职称英语分类

职称英语综合类A级

职称英语

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The word "threatened" in the first sentence of the first paragraph could be best replaced by Why do researchers estimate elepha

职称英语综合类A级

职称英语

AStrongreactionsBAnxietyaboutthefutureofcloningCTherighttochooseDWhatiscloning?EArgumentsinfavorofc

(46)Picturephoneservice,whichwillbecomeavailablecommerciallyinthe1970s,willatfirstprobablybeusedbylargebusines

TheindustrialrevolutionmodifiedthewholestructureofEnglishsociety.

SolarPowerwithoutSolarCellsAdramaticandsurprisingmagneticeffectoflightdiscoveredbyUniversityofMichiganrese

Aresearchcenterhasbeensetupinthiscountry.

MotoringTechnology1.2millionroaddeathsworldwideoccureachyear,plusafurther50millioninjuries.Toreducecarcr

HumanandCultureHumanbeingsareanimals.Webreathe,eatanddigest,andreproducethesamelifeprocessescommontoal

HowtoGetalongWellwithYourBoss1．Beforeyouarguewithyourboss,checkwiththeboss’ssecretarytodeterminehismood

Hetalkstoughbuthasatenderhead.

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