For centuries animals have been used as ____ for people in experiments to assess

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问题 For centuries animals have been used as ____ for people in experiments to assess the effects of therapeutic and other agents that might later be used in humans.

选项 A、benefactors
B、companions
C、examples
D、precedents
E、surrogates

答案 E

解析 - 方程等号：later表现时间对比，前后句意反义重复。
- 强词和对应：空格和use构成反义重复，之后在人身上使用，所以之前在人身上“不使用”药，在动物身上使用药物，所以动物就是人类的替代品。benefactor捐赠者，companion同伴，example例子，precedent先例，surrogate替代品。答案选E。

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For centuries animals have been used as ____ for people in experiments to assess

Ethnologistsareconvincedthatmanyanimalssurvivethroughlearningbutlearni

EventhoughformidablewintersarethenormintheDakotas,manypeoplewereunp

Philosophicalproblemsarisewhenpeopleaskquestionsthat,thoughvery____,h

Animalsthathavetastedunpalatableplantstendto____themafterwardontheb

Peopleshouldnotbepraisedfortheirvirtueiftheylacktheenergytobe(i)_

FormanyyoungpeopleduringtheRoaringTwenties,adisgustwiththeexcesseso

Ouryoungpeople,whose(i)_____sensitivitieshavenotyetbecome(ii)_____,ha

Inthedesignofmedicalexperiments,theneedfor(i)________assignmentoftre

Cynicsbelievethatpeoplewho____complimentsdosoinordertobepraisedtwi

TheresultsoftheexperimentsperformedbyElizabethHazenandRachelBrownwer

[originaltext]M:Honey,thebasketballgameisabouttostart.Couldyoubring

The35-year-oldBeijingwomaniswatchinganadshowingagianttelevisionm

BarackandMichelleObamaunderstandtheheavyburdenofstudentloandebt.

播音主持语言的分寸感是驾驭创作过程的核心要素，内容主次、感情浓淡、（ ）、话语

在净收益营运指数的计算中，经营净收益是净利润与非付现费用之差。()

推车式灭火器的喷射距离是指在喷射控制阀完全开启状态下，当灭火剂被喷出（）时，喷

建筑面积大于（）㎡的人防工程内地下商场应设置自动喷水灭火系统。A.200 B

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Ouryoungpeople,whose(i)_sensitivitieshavenotyetbecome(ii)_,ha

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