旋涡泵主要应用在代替低比转数、低扬程的离心泵的场合。
A. 对
B. 错
轴流泵启动时应在闸阀全开的情况下启动电动机，一般称为“开闸启动”。
A. 对
B. 错
Who is the narrator in Chapter 3 in Wuthering Heights?
A. Lockwood
B. Nelly
C. Zillah
D. Cathy
The story in Wuthering Heights is mainly about the intertwined conflicts between___:
A. Wuthering Heights and Thrushcross Grange.
B. Wuthering Heights and the Satis House.
C. Thrushcross Grange and Lowood.
D. Thrushcross Grange and Thornfield.
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