离心泵主要零部件的作用是什么?

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问题:

离心泵主要零部件的作用是什么?

考点:热注运行工考试初级热注运行工初级热注运行工题库
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企业对持有交易性金融资产期间发生现金股利应按准则的要求进行会计处理。下列各项中,按照准则规定对此事项的会计处理是( )。

A.冲减投资成本

B.计入公允价值变动损益作为当期损益处理

C.冲减原发生的相关税费

D.计入投资收益作为当期损益处理

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Questions 56-60 are based on the following passage.
The Frugal Gourmet Cooks American
by Jeff Smith
Our real American foods have come from our soil and have been used by many groups—those who already lived here and those who have come here to live. The Native Americans already had developed an interesting cuisine using the abundant foods that were so prevalent.
The influence that the English had upon our national eating habits is easy to see. They were a tough lot, those English, and they ate in a tough manner. They wiped their mouths on the tablecloth, if there happened to be one, and they ate until you would expect them to burst. European travelers to this country in those days were most often shocked by American eating habits, which included too much fat and too much salt and too much liquor. Not much has changed! And, the Revolutionists refused to use the fork since it marked them as Europeans. The fork was not absolutely common on the American dinner table until about the time of the Civil War, the 1860s. Those English were a tough lot.
Other immigrant groups added their own touches to the preparation of our New World food products. The groups that came still have a special sense of self-identity through their ancestral heritage, but they see themselves as Americans. This special self-identity through your ancestors who came from other lands was supposed to disappear in this country. The term melting pot was first used in reference to America in the late 1700s, so this belief that we would all become the same has been with us for a long time. Thank goodness it has never worked. The various immigrant groups continue to add flavor to the pot, all right, but you can pick out the individual flavors easily.
The largest ancestry group in America is the English. There are more people in America who claim to have come from English blood than there are in England. But is their food English Thanks be to God, it is not! It is American. The second largest group is the Germans, then the Irish, the Afro-Americans, the French, the Italians, the Scottish, and the Polish. The Mexican and American Indian groups are all smaller than any of the above, though they were the original cooks in this country.

Which of the following statements is true

A.People from other cultures or nations start to lose their self-identity once they get settled down in America.

B.The "melting pot" is supposed to melt all the foods but in reality it doesn’t.

C.The special sense of self-identity of people from other countries can’t maintain once they become Americans.

D.The "melting pot" finds it capable of melting all the food traditions into the American tradition.

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冷备份又叫( )备份,它是指当执行备份操作时,服务器将不接受来自用户与应用系统对数据的更新。

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在有风条件下,用高斯型大气扩散模式计算地面浓度,确定σz考虑的因索有()。

A.大气稳定度

B.逆温层高度

C.下垫面特征

D.风速随髙度变化

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C62B型敞车的主要结构与()型敞车基本相同。

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