单项选择题
A.故障、火警、监管 B.火警、故障、监管 C.火警、监管、故障 D.故障、监管、火警
A.3 B.5 C.15 D.30
A.1.0~1.2m B.1.2~1.5m C.1.3~1.5m D.1.5~1.8m
A.10 B.20 C.30 D.60
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