外存储器既是计算机的输入设备，又是计算机的输出设备。 ( )
参考答案：对
解析： 外存储器既是计算机的输入设备，又是计算机的输出设备。
The pork price is expensive. I’ve got about half the amount I had at home and I’m paying here.
A．as three times much
B．as much three times
C．three times as much
D．much as three times
在波动压力下压力表的使用范围不应超过刻度极限（）
A.60%
B.70%
C.80%
