关好厅、轿门并确定已经选好层、定好向，电梯却不能运行的故障排除方法有哪些？
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设备已具备运行条件，经一次合闸操作即可转为运行状态，该设备处于什么状态（）
A. 运行
B. 热备用
C. 冷备用
D. 检修
Which method is used to detect rot in manila lines?（）
A. Feeling the surface of the line for broken fibers
B. Measuring the reduction in circumference of the line
C. Observing for the appearance of mildew on the outer surface
D. Opening the strands and examining the inner fiber
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