购机送话费的话费赠送在什么账户?() ["A.基本账户","B.赠送账户","C.根据客户意愿而定","D.根据业务规则视乎客户办理套餐的价格而定"]
矿井必须加强井巷维修,保持足够的通风断面。下列有关井巷维修说法正确的有()。 ["A、矿井巷道失修率不超过7%","B、矿井巷道严重失修率不超过3%","C、矿井巷道严重失修率不超过7%","D、矿井巷道失修率不超过3%"]
预存购机的话费返还在什么账户?() ["基本账户","赠送账户","根据客户意愿而定","根据业务规则视乎客户办理套餐的价格而定"]
改变主通风机特性的调节法有()2种办法,即或。 ["A、改变主要通风机叶片安装角","B、改变主要通风机的转速","C、换高频率的通风机","D、减少井下用风地点"]
凡进行钻井取心的井段,无论收获率高低。均不再进行井壁取心。()
何谓阴湿与阳湿?