2. 外语
  3. Electronic computers______, the complicated mathematical operations, such as weather forecast and the control of satellites, can

Electronic computers______, the complicated mathematical operations, such as weather forecast and the control of satellites, can

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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，所以要用完成式表示使用计算机发生在先。题句意为：“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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