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【判断题】
离心泵启动前必须充满液体是为了防止发生气蚀现象。A.
正确
B.
错误
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反馈参考答案：
举一反三
【判断题】When pouring,the waiter should touch the bottle with the glass,in case no drops are out of the bottle.
A.
正确
B.
错误
【简答题】In Ms. Hudson’s class, the bottle and balloon setup is a closed system because the balloon on the bottle fills with air from ____________ the bottle.
【简答题】The bottle with the words" DRINK ME" , which Alice very soon finished, made her____(smaller or bigger?).
【单选题】Children, hold the bottle with your right hand. Tommy, you are not correct. Please use your ________ hand. [ ]
A.
other
B.
the other
C.
another
D.
the another
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