在煤与瓦斯突出矿井或突出区域的采掘工作面和瓦斯矿井的掘进工作面,应选用___________自救器。
参考答案:隔离式。
— It is reported that in the basketball game China won against Japan by the heavy score of 102-85.
—_______ exciting news!
A.How a
B.What a
C.How
D.What
整流模块的输入电压范围为()Ue。
A、80%~120%
B、85%~110%
C、85%~115%