当离心泵发生严重气蚀现象后，泵体温度（）。A、下降 B、不变

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问题单项选择题

当离心泵发生严重气蚀现象后，泵体温度（）。

A、下降

B、不变

C、上升

D、急速升高

答案

参考答案：D

补全对话，情景问答

根据答语，选择相应的问句。
( )1. He works evenings and weekends. ( )2. He likes to be in the school play. ( )3. He wants to be a writer. ( )4. He works in that zoo. ( )5. He likes to play soccer.	A. Where does he work? B. What does he like to do? C. What does he want to be? D. When does he work? E. What does he like to be?

判断题

油罐、油桶或管道焊缝砂眼不会造成油品泄漏。