SICASECC和SIMISPC之间的连通是由哪种通讯技术实现的?()
A.Ethernet以太网
B、Profibus总线
C、Serial interface串口
参考答案:A
Since you have repaired my TV set, _____is no need for me to buy a new one.[ ]
A. it
B. there
C. this
D. that
()分贝(dB)的噪声在噪声分类中属于烦恼的噪声级。
A、80
B、85
C、90
D、95