三相电源的线电压为380V,对称负载Y形接线,没有中性线,如果某相突然断掉,则其余两相负载的相电压()。
A.不相等
B.380V
C.190V
D.220V
参考答案:C
The majority of people in the town strongly ____ the plan to build a playground for children.
A.consider
B.support
C.confirm
D.submit
什么网络技术允许NIC(网卡)可以同时接收或发送数据?()
A.多态
B.半双工
C.全双工
D.对等