所有电流互感器和电压互感器的二次绕组应有一点且仅有一点永久性的、可靠的保护接地。（ ）
参考答案：对
The clever boy made a hole in the wall, _____ he could see _____ was going on inside the house.
A．which;what
B．throughwhich;what
C．throughthat;what
D．what;that
宽限期介于提款期和还款期之间，公司可以不用偿还本息，银行也不计算利息。( )
