U形液柱压力表,当一端通大气,另一端接被测压力时,U形管两边管内液面便会产生(),由

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问题:

U形液柱压力表,当一端通大气,另一端接被测压力时,U形管两边管内液面便会产生(),由此就可以知道被测压力(表压)的数值。

A.流动差

B.压力差

C.距离差

D.高度差

考点:输气工考试输气工初级输气工初级题库
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工厂的一个车间就是一个法人。 ( )

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短文改错

文中共有10处语言错误,每句中最多有两处。错误涉及一个单词的增加、删除或修改。

增加:在缺词处加一个漏字符号(∧),并在其下面写出该加的词。

删除:把多余的词作斜线(\)划掉。

修改:在错的词下划一横线,并在该词下面写出修改后的词。

注意:1.每处错误及其修改均仅限一词;

2.只允许修改10处,多者(从第11处起)不计分。

Helen was a twenty-years-old girl. She has never had a job before. Now she wanted to get a work. So she went to meet Mr Black, the manager of hotel. Mr Black told her it was getting very busy in the hotel at the evening. He ask her if she was interesting in a part-time job. The girl said that she did. Then Mr Black said she had to work very fast and that she must be there at six every afternoon and work from six to ten, from Monday to Friday. He offered her with 4.5 dollars an hour. Hellen pleased with the offer and decided to start work the next day.

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“FIDIC条件”规定,施工合同出现纠纷,可用以下方式解决( )。

A.协商

B.争端裁决委员会决定

C.仲裁

D.工程师决定

E.诉讼

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对该病例首先采用的抗菌药物是()

A.四环素

B.喹诺酮类

C.氯霉素

D.庆大霉素

E.呋喃唑酮

题型:单项选择题

有关偏倚的说法,正确的是()

A.偏倚是一种随机误差

B.选择偏倚可发生于流行病学研究的各个阶段

C.诊断怀疑偏倚是由于研究者事先了解研究对象的患病情况或某种结局,因而在不同组间调查暴露史的方式不同而引起的偏倚

D.产生混杂偏倚的混杂因素不一定是所研究疾病的独立危险因子

E.偏倚是一种非随机误差

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