Computers will flourish because they enable us to accomplish tasks that

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问题 Computers will flourish because they enable us to accomplish tasks that

选项 A、could never before have been undertaken
B、would never before have undertaken
C、couldn’t be undertaken
D、mustn’t have been undertaken

答案A

解析此题只要正确理解了句子的意思，做出正确选择并不难。句意为："计算机使人们得以干以前干不了的事，因此它将兴旺发达起来"。用could never before have been un—dertaken暗含虚拟语气的意义。虽然B项也是虚拟形式，但语态不对。

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Computers will flourish because they enable us to accomplish tasks that

在职攻硕英语联考

Carbon______referstothetotalsetofgreenhousegasesemissionscausedbyanorganization.

Onewaytomaintainsocialstabilityistocrackdownoncrimewhilecreatingmorejobs.

WhatwasMichaelGeisenbeforebeingascienceteacher?

Theoriesaccountingforthephysicalprocessofcolorvisionhaveundergonemanychangessince1801,whenThomasYoungfirstsug

PabloPicassowasthemostinfluentialandsuccessfulartistofthe20thcentury.Painting,sculpture,graphicart,andceramics

Thereligionsoftheworldhaveproducedgreatbooks,withgreatlessonstoteach.Ifwefollowed(36)iswritteninthebooks

Virtuallynobodyhasmemoriesfromveryearlychildhood—butit’snotbecausewedon’tretaininformationasyoungchildren.Rath

Iwasdesperatelynervousaboutbecomingcar-free.Buteightmonthsagoourelderlypeoplecarrierwashitbyapassingvehicle

In1742BenjaminFranklininventedanewtypeofstove,forwhichhewasofferedapatent.Franklinrefusedit,arguinginhisa

Onthesurface,shoppingonlineseemsenvironmentallyfriendly:iteliminatescartripsandcarbonemissions.Butwhataboutthe

A．扩张冠状动脉增加冠脉血流B．减慢心率，降低血压，减少心肌氧耗量C．扩张冠脉，解除冠脉痉挛D．抗血小板聚积，防止血栓形成E．扩张动静脉，降低心脏前后负荷心痛定

A．常量元素B．必需微量元素C．可能必需微量元素D．宏量营养素E．植物化学物蛋白质属于()

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