【单选题】The person who is _______ of the factory _______ ill since last week.
【单选题】塑料外壳式断路器的 过电流脱扣即热脱扣,用于保护电动机时.通过 ( ) 脱扣整定电流 2h 内不动作,通过 1.2 倍时, 2h 内动作。
【单选题】离心泵的工作原理是利用叶轮高速旋转产生的( )
【单选题】The ____ person was in bad health. [ ]
【单选题】He is in hospital,He is a person.
【单选题】You should be careful of such a person flatters you in your presence and speaks ill of you in behind.
【单选题】旋涡泵的工作原理和离心泵相似,也是基于( )的作用。
【单选题】The person who is _______ of the factory _______ ill since last week.
B.
in the charge; has fallen