A.10天 B.15天 C.1個(gè)月 D.1個(gè)季度
A.5 B.8 C.10 D.15
A.70% B.80% C.85%
A.16 B.32 C.48 D.64
《煤礦安全規(guī)程》,《作業(yè)規(guī)程》,《技術(shù)操作規(guī)程》