当前位置：在线题库搜索＞[单选题]当液体的密度改变时,离心泵的压头H和轴功率N的变化为( )。的答案是什么？
问题：
[单选题]当液体的密度改变时,离心泵的压头H和轴功率N的变化为( )。
A、H、N均不变
B、H不变,N改变
C、H改变,N不变
D、H、N均改变
参考答案：
B
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