【单选题】
以下哪种图纸不是《煤矿安全规程》规定煤矿必须填绘反映实际情况的图纸。___
A. 井下职业病危害因素分布图#
B. 压风、排水、防尘、防火注浆、抽采瓦斯等管路系统图#
C. 井下运输系统图#
D. 井上、下配电系统图和井下电气设备布置图
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答案
A
解析
暂无解析
相关试题
【单选题】
传输线能否作为集中参数来处理，取决于___。
A. 传输线的绝对长度#
B. 传输线的相对长度#
C. 传输线的绝对长度与所传输信号电磁波的最短波长的比值#
D. 传输线的绝对长度与所传输信号电磁波的最长波长的比值
【单选题】
根据某只晶体管的各极对地电压分别是VB = -6.3v，VE = -7v，VC = -4v，可以判定此晶体管是___管，处于（ ）。
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B. NPN管,截止区#
C. PNP管，截止区#
D. PNP管，放大区
【单选题】
采区设计,采掘作业规程，必须对安全监控设备的种类,数量和位置,信号电缆和电源电缆的敷设，控制区域等做出明确规定，并绘制___布置图。
A. 通风系统#
B. 防尘系统#
C. 安全监控#
D. 供电系统
【单选题】
使用便携式甲烷检测报警仪或便携式光学甲烷检测仪与甲烷传感器进行对照，当两者读数误差大于允许误差时，先以读数较大者为依据，采取安全措施并必须在___内对2种设备调校完毕。
A. 8#
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C. 24#
D. 48
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