Electronic computers______ the complicated mathematical operations such as weather forec
专四
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Electronic computers______, the complicated mathematical operations, such as weather forecast and the control of satellites, can be done quickly and accurately.
A.being used
B.used
C.having been used
D.to be used
请帮忙给出正确答案和分析,谢谢!
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正确答案:C
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。
