放线、紧线时，应检查接线管或接线头以及过滑轮、横担、树枝、房屋等处（）。
A. 有无卡压现象
B. 导线是否平衡
C. 跨越架是否牢固
D. 视线是否清晰
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临时建筑场地应设有消防车道，且消防车道的宽度不应小于（）m，净空高度不宜小于（）m。
A. 4；3
B. 4.5；3.5
C. 4；4
D. 4.5；3
Refer to the exhibit.What is the reason that the interface status is “administratively down,line protocol down”?（）
A. There is a mismatch in encapsulation types
B. The wrong type of cable is connected to the interface
C. The interface has been configured with the shutdown command
D. The interface is not receiving any keepalives
E. The interface needs to be configured as a DTE device
F. There is no encapsulation type configured
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