什么是泵的工作曲线？_爱下问搜题

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问题问答题简答题

什么是泵的工作曲线？

答案

参考答案：

泵的工作曲线就是在转数为某一定值下，流量与扬程、所需功率及效率间的关系曲线。即Q—H曲线、Q—N曲线、Q—η曲线。

多项选择题

民爆从业单位可以通过民爆网络服务平台申请（）等业务。

A.爆破作业单位资质

B.生产企业资质

C.销售企业资质

D.爆破作业人员资格

完形填空

My husband and I both work at home. We have four children, so the times when I am   36 in the house are few. Like many work-at-home moms, when I do get a   37 to be by myself, I fill that time with more   38 , whether it’s related to my career or taking care of the housework. Most of the time, I don’t mind.   39 , I wanted this job as wife and mother, and I knew from the start that it often   40 putting others’ needs before my own. But, other times, I can’t help but feel a little 41 because I seldom had any plans for myself, and everyone knew it. My life   42 on my family, but they seldom appreciated this, which often   43 me a lot.
One day, when the kids were at school, I   44 for the movie theater-alone, I’d   45 been to the movies alone before, so I was a little nervous. Would I look pitiful going to the theater by myself? Was I being ridiculous(荒唐可笑) by seeing a movie   46 so much work waited for me at home? I 47 myself to swallow these   48 and bought myself a ticket. And then I walked into the theater with my   49 held high and enjoyed every minute of the movie. I laughed and felt my good spirits   50 for a couple of hours, I was   51 wife or mother. I was just myself.
From that point on, I   52 that Fridays would be mine,   53 for a couple of hours. Some Fridays, I head to(前往) the beach with a good book. Other Fridays, I go shopping,   54 up a little fast food or some clothes just for myself. I really 55   my Fridays after a long week of caring of my family.

B．From then on

C．As a result

A．everybody’s

B．somebody’s

C．anybody’s

A．come up with	B．break away from
C．look forward to	D．pay attention to