问题
单项选择题
泵的运行工况点是由哪两条曲线的交点所定（）。
A.扬程—流量和效率—流量
B.扬程—流量和轴功率—流量
答案
参考答案：A
搜题请搜索小程序“爱下问搜题”
泵的运行工况点是由哪两条曲线的交点所定（）。
A.扬程—流量和效率—流量
B.扬程—流量和轴功率—流量
参考答案：A
I’m Li Fen. I have a pen pal. name is Mary. She is from Canada. She lives in Toronto. She speaks English. She has brother ,but she has no sisters. Her favorite is art. Two of my good friends pen pals,too. Lu Yang’s pen pal is from .His name is Tony. Tony lives in Paris. He speaks .He has one brother and one .His favorite subject is PE. And he can play soccer very .Ding Lan’s pen pal is from .Her name is Wendy. Wendy can speak Chinese and English. She no brother or sister. Her favorite subject is history.
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