單項(xiàng)選擇題
A.1/2 B.1/3 C.1/4
A.150mm B.180mm C.200mm
A.0.3 B.0.4 C.0.5
A.嚴(yán)禁 B.可以 C.隨時(shí)
A.50mm B.100mm C.150mm
A.0.5m B.1.0m C.1.5m
A.對(duì)接 B.搭接 C.對(duì)接或搭接
A.2 B.3 C.4
A.1m B.1.2m C.1.5m
A.0.5m B.1m C.1.5m