离心泵一般适用于输送()的液体。
A、流量大扬程低
B、流量小扬程高
C、流量小扬程低
D、流量大扬程高
参考答案:A
Could you please tell me ______ just now?[ ]
A. what's happened
B. what's happening
C. what happened
D. what was happened
用不超过350宇的篇幅,概述出给定资料所反映的主要问题的原因是什么。