在微型计算机中，RAM是（）。
A.顺序读写存储器
B.随机读写存储器
C.只读存储器
D.高速缓冲存储器
参考答案：B
Windows 7 was created in 2009, many computer lovers were interested and excited.
A．when
B．where
C．why
D．which
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