CPU从I/O接口的______中获取外部设备的“准备好”、“忙”或“闲”等状态信息。
参考答案：状态存储器
After the new machine was introduced, the factory produced _____ in 2011 as the year before.
A．twice as many machines
B．twice many as machines
C．as twice many machines
D．as many machines twice
易合并胸膜间皮瘤的尘肺见于（）
A.煤尘肺
B.矽肺
C.石墨尘肺
D.石棉肺
E.炭黑尘肺
