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某单吸单级离心泵,Q=0.0735 m3/s,H=14.65 m,用电机由皮带拖动,测得n=1 420 rpm,N=3.3 kW;后因改
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某单吸单级离心泵,Q=0.0735 m3/s,H=14.65 m,用电机由皮带拖动,测得n=1 420 rpm,N=3.3 kW;后因改

为电机直接联动,n增大为l 450 rpm,此时泵的工作参数为()。

A.Q=0.075 0 m3/s,H=15.28 m,N=3.50 kW

B.Q=0.076 6 m3/s,H=14.96 m,N=3.50 kW

C.Q=0.075 0 m3/s,H=14.96 m,N=3.37 kW

D.Q=0.076 6 m3/s,H=15.28 m,N=3.44 kW

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更多“某单吸单级离心泵,Q=0.0735 m3/s,H=14.65 m,用电机由皮带拖动,测得n=1 420 rpm,N=3.3 kW;后因改”相关的问题

第1题

Mr. Green asked to be taken to the police station because he ______. A. didn't like

Mr. Green asked to be taken to the police station because he ______.

A. didn't like to give his name and address to the policeman

B. wanted to get help and tell the truth there

C. didn't like to talk too much with the policeman

D. wanted to leave the man in his car and let him go

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第2题

The police arrested the suspect yesterday and released him this morning.A.freedB.relievedC

The police arrested the suspect yesterday and released him this morning.

A.freed

B.relieved

C.kicked

D.liberated

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第3题

The suspect was arrested because the police found blood _____ on the suspect's sh
irt.

A、marks

B、signs

C、stains

D、spots

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第4题

The police arrested the suspect yesterday and released him this morning. A.free

The police arrested the suspect yesterday and released him this morning.

A.freed

B.relieved

C.kicked

D.liberated

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第5题

If a suspect's fingerprint is found by the police, he cannot ______ the charge.A.acceptB.c

If a suspect's fingerprint is found by the police, he cannot ______ the charge.

A.accept

B.commit

C.deny

D.prove

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第6题

To escape the police the suspect had to conceal his ______ under a false name.A.identityB.

To escape the police the suspect had to conceal his ______ under a false name.

A.identity

B.evidence

C.status

D.recognition

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第7题

First of all, the police should tell the suspect that he can ______ under the law.A.keep s

First of all, the police should tell the suspect that he can ______ under the law.

A.keep silent

B.inform. his family

C.find a lawyer

D.speak against himself

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第8题

Why did Mr. Moore write the letter to the newspaper?A.He hope more people would know he ha

Why did Mr. Moore write the letter to the newspaper?

A.He hope more people would know he had lost some expensive books.

B.He thought in this way the thief (贼) would bring the books back to him.

C.He wanted to buy old and modern books.

D.He wanted to tell the police he had lost some expensive books.

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第9题

Once the police book a suspect under a fake name, it is difficult to get the name off the
list, because______.

A.it is banned by police

B.the police are not willing to remove it

C.it takes the police a lot of time to remove it

D.it makes the police embarrassed

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