单选题:下列有关计算机性能的描述中,不正确的是(  )。

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题目内容:
下列有关计算机性能的描述中,不正确的是(  )。 A.一般而言,主频越高,速度越快
B.内存容量越大,处理能力就越强
C.计算机的性能好不好,主要看主频高不高
D.内存的存取周期也是计算机性能的一个指标
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