绘图题：画出某220/380V三相四线制电路供电一路进线，三路出线照明配电的电气主接线。
参考答案：
如图E-28所示。
It was the dream that he would make ______ good fortune on the international stages that made Lang Lang decide to go to the USA for ______ further study.
A．a, a
B．/, the
C．a, /
D．the, the
微机保护装置中，模拟低通滤波器的符号是（）。
A、ALF
B、S/H
C、VFC
D、A/D
