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[主观题]

某液压泵铭牌上标有额定压力为8MPa,额定流量为60L/min,总效率η=0.8,此泵使用在特定的液压系统中,

该系统要求泵的工作压力为4MPa,此时该泵应选配电机的功率为()。

A.10kW

B.7.5kW

C.5kW

D.2.5kW

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更多“某液压泵铭牌上标有额定压力为8MPa,额定流量为60L/min,总效率η=0.8,此泵使用在特定的液压系统中,”相关的问题

第1题

The above chart shows individual income tax in China. The tax free threshold is 3,500
RMB per month. The tax rates are divided into 7 brackets. The lowest rate is 3% for income between 3,501 and 5,000, while the highest rate is 45% for income over 80,000. Therefore, the higher our income is, the more tax we should pay. Tax, which can be used in public services such as education, road construction, public health and so on, is very important to our country. As we all know, tax makes up a great part of our country’s revenue, and the development of our country depends on it. From what has been discussed above, we can see that it is everyone’s legal duty to pay tax because taxes contribute to the country and create benefits for everyone. Those who try to evade taxation are sure to be punished. In short, paying tax is our responsibility to society.Decide if each of the following statements is TRUE (T) or FALSE (F).

1. The purpose of the passage is to help people know the tips how to pay less tax.()

2. According to the chart, if a person’s monthly is 3600 yuan, he doesn’t need to pay tax.()

3. How much income tax a person pays each month depends on how much his/her income is.()

4. The underlined word “evade” in the last paragraph means increase.()

5. Personal income taxes are included in a government’s revenue.()

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第2题

Services can be used instead of money to pay for goods.A.RightB.WrongC.Doesn't say

Services can be used instead of money to pay for goods.

A.Right

B.Wrong

C.Doesn't say

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第3题

It can be inferred from the passage that public services ______.A.have benefited many peop

It can be inferred from the passage that public services ______.

A.have benefited many people

B.are the focus of public attention

C.have often been the laughing stock

D.are an inappropriate subject for humor

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第4题

It can be inferred from the text that public services ______.A.have benefited many peopleB

It can be inferred from the text that public services ______.

A.have benefited many people

B.are the focus of public attention

C.are an inappropriate subject for humor

D.have often been the laughing stock

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第5题

It can be inferred from the text that public services ______.A.have benefited many peopleB

It can be inferred from the text that public services ______.

A.have benefited many people

B.are the focus of public attention

C.are an inappropriate subject for humor

D.have often been the laughing stock

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第6题

It can be inferred from the text that public services ______.A.have benefited many people.

It can be inferred from the text that public services ______.

A.have benefited many people.

B.are the focus of public attention.

C.are an inappropriate subject for humor.

D.have often been the laughing stock.

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第7题

Services can be used instead of money to pay for goods.A.RightB.WrongC.Doesn't say

Services can be used instead of money to pay for goods.

A.Right

B.Wrong

C.Doesn't say

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第8题

Services can be used instead of money to pay for goods.A.Right.B.Wrong.C.Doesn't say.

Services can be used instead of money to pay for goods.

A.Right.

B.Wrong.

C.Doesn't say.

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第9题

It can be inferred from the passage that public services ______.A.have benefited many peop

It can be inferred from the passage that public services ______.

A.have benefited many people

B.are the focus of public attention

C.are an inappropriate subject for humor

D.have often been the laughing stock

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第10题

It can be inferred from the passage that public services ______.A.have benefited many peop

It can be inferred from the passage that public services ______.

A.have benefited many people

B.are the focus of public attention

C.are an inappropriate subject for humor

D.have often been the laughing stock

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