下列叙述中错误的是 A) 内存储器一般由ROM和RAM组成 B) RAM中存储的数据一旦断电就全部丢失 C) CPU可以直接存取硬盘中的数据 D) 存储在ROM中的数据断电后也不会丢失
A.
B.
C.
D.
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