电梯的小区划分应将电梯与（）划分为同一小区。
A、低层
B、中层
C、高层
D、任意层
参考答案：A
Why didn’t I do the job
A．Because it would be too time-consuming.
B．Because I wanted to do it myself.
C．Because nobody had done it before.
D．Because nobody joined me.
造成继电器接点电阻大的原因有哪些，应如何克服？
