单项选择题
A.向上级汇报 B.向调度室汇报 C.立即断电停车并向调度室汇报 D.到井口再急停
A.1/4 B.1/3 C.1/2 D.1/1
A.10% B.15% C.20% D.25%
A.5% B.10% C.15% D.20%
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