【单选题】【消耗次数：1】
计算机的运算速度通常采用的计量单位是（）。
①
次/每小时
②
次/每分
③
次/每秒
④
转/每秒
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相关题目
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ENIAC占地面积达170平方米，它使用了大约（ ）只电子管，重30吨，运算速度为每秒5000次加法或50次乘法。
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