开拓掘进率
参考答案:开拓巷道掘进总进尺/(矿井产量+工程出煤)(m/万t)
______up the recovery process, the government declared a public health emergency in the Gulf Coast areas hit by the hurricane.
A.To speed
B.Speeding
C.Speed
D.Having sped
箱体上无需明示的内容是()
A.卷烟数量,以支计
B.“吸烟有害健康”警句
C.价类
D.箱体规格,标识为(长×宽×高)