【单选题】喷油器针阀与阀座密封面磨损下沉后产生的后果是________。
【单选题】There _____ not any water in the glass.
【简答题】用be动词的适当形式填空。 1. There____ a football match on TV yesterday evening. 2. There____not enough people to pick apples that day. 3. How many students ____ there in your class last term? 4. Tony with hi...
【简答题】常用的自由锻设备中,作用力为静压力的是()。
【简答题】II . 用 be 动词的适当形式填空。 1. There _______ ( be ) many things over there. 2. There _______ (be) a little girl in the room. 3. _______ there any water on the moon? 4. _______ (be) there any pictures on the ...
【简答题】空气锤是自由锻常用设备,500Kg空气锤指的是______为500Kg。
【判断题】胎模锻最常用的设备是空气锤、摩擦压力机、蒸汽一空气自由锻锤。( )