三个驱动元件的电能表用于（）供电系统测量和记录电能。
A、二相三线制
B、三相三线制
C、三相四线制
D、三相五线制
参考答案：C
—Let's have hamburgers for breakfast.
—_____. [ ]
A. That sounds great
B. Yes. Let's do
C. Let's have eggs
D. No, I don't like hamburgers.
翻车机压车梁加装的压力开关定值大概是多少？
