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【单选题】
、下列叙述错误的是( )A.
真空泵是获得高于大气压的一种机械设备
B.
旋片式真空泵不适用于抽除含氧量过高的、有毒的、有爆炸性的的气体
C.
式真空泵适用于抽吸具有腐蚀性、易燃、易爆的气体，且不易发生危险
D.
喷射泵适用于抽吸腐蚀性气体或有毒气体
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【简答题】It simply was that we were such egoists, so self-engrossed , so wrapped up in ourselves that we hadn't a corner in our hearts for anybody else. ( Para. 61) It simply was that we were so ______, so ___...
【简答题】It was when we started living together that we found, to our sadness and surprise, that we were .
【单选题】So excited and joyful ______ that we were soon completely lost in paying and laughing.
A.
we felt
B.
felt we
C.
did we feel
D.
had we felt
【单选题】B136 . 贾某经营了一农家乐餐厅,该餐厅把人工养殖的鱼当作野生鱼出售给顾客,这种行为主要违反了
A.
公平原则
B.
诚实信用原则
C.
等价有偿原则
D.
自愿原则
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