Electronic computers______, the complicated mathematical operations, such as wea

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问题 Electronic computers______, the complicated mathematical operations, such as weather forecast and the control of satellites, can be done quickly and accurately.

选项 A、being used
B、used
C、having been used
D、to be used

答案 C

解析分词短语在此处作原因状语，使用了计算机才能进行又快又准确的运算，两者之间有个先后关系，所以要用完成时表示使用计算机发生在先。此句译文为：由于使用了计算机，像天气预报和卫星控制之类复杂的数学运算可以完成得又快又准确。

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Electronic computers______, the complicated mathematical operations, such as wea

TheproblemwassocomplicatedthatMr.Smithhadto______hisbrains.A、crackB、c

Wedon’thavemorecomputersinstock,orwe______yourorderimmediately.A、have

Computerscanprovideinformationwhichallowsbusinessmento______theirlisto

Acomputerisamachinedesignedtoperformworkmathematicallyandtostore

Acomputerisamachinedesignedtoperformworkmathematicallyandtostore

Acomputerisamachinedesignedtoperformworkmathematicallyandtostore

Thiscountryisfullycommittedtotheintroductionofcomputersintoschool

Thiscountryisfullycommittedtotheintroductionofcomputersintoschool

Thiscountryisfullycommittedtotheintroductionofcomputersintoschool

Thiscountryisfullycommittedtotheintroductionofcomputersintoschool

Oneday,whileatworkinthecoalmine,Ihappenedtooverheartwominersta

Itiswellknownthatteenageboystendtodobetter(1)_____maththangirls

Bytheendofthissemester,wesurely______asatisfactorysolutiontothepro

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