泵进口密封填料漏气严重，会导致泵（）。A.抽空 B.汽化 C._爱下问搜题

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问题单项选择题

泵进口密封填料漏气严重，会导致泵（）。

A.抽空

B.汽化

C.停运

D.反转

答案

参考答案：A

选择题

—There are thousands of foreigners living in Jiaxing now.
—Yes, but much fewer before. There were only ______ them.

A. hundreds of
B. thousands of
C. millions of
D. billions of

判断题

缓坡种树，陡坡种草。