什么叫扬程?

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问题:

什么叫扬程?

考点:化工总控工考试化工总控工考试题库
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乳酸(C3H6Ox)是一种重要的体内代谢物.其相对分子质量为90.求:

(1)x的值为_________;

(2)180g乳酸中含碳元素为________g.

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Learning a Second Language

Some people learn a second language easily. Others have trouble learning a new language. How can you help yourself learn a new language, such as English? There are several ways to make learning English a little easier and more interesting.

The first step is to feel positive about learning English. If you believe that you can learn, you will learn. Be patient. You do not have to understand everything all at once. It is natural to make mistakes when you learn something new. We can learn from our mistakes. In other words, do not worry about taking risks.

The second step is to practice your English. For example, write a diary every day. You will get used to writing it in English, and you will feel comfortable expressing your ideas in English. Several weeks later, you will see that your writing is improving. In addition, you must speak English every day. You can practice with your classmates outside class. You will all make mistakes, but gradually you will become comfortable communicating in English.

The third step is to keep a record of your language learning. You can write this in your journal. After each class, think about what you did. Did you answer a question correctly? Did you understand something the teacher explained? Perhaps the lesson was difficult, but you tried to understand it.

You must be positive about learning English and believe that you can do it. It is important to practice every day and make a record of your achievements. You will enjoy learning English, and you will feel more confident in yourself.

小题1:To feel positive about learning English means _______.

A.if you are patient, you will learn

B.you can understand everything all at once

C.if you make mistakes, you can learn from your mistakes

D.if you believe you can learn, you will learn小题2:When you learn English, you do not need to ______.

A.be patient

B.make mistakes

C.express your ideas in English

D.understand everything all at once小题3:What is not helpful for you to enjoy learning English?

A.To communicate in English.

B.To worry about taking risks.

C.To think about what has been done after each class.

D.To make a record of the achievements.小题4:What is the main idea of this passage?

A.It is very important to learn a second language.

B.Some people learn a second language easily while other people do not.

C.There are ways to help you learn a second language more easily.

D.Don’t worry about taking risks when learning a second language.小题5:What does the underlined word “journal” in the 4th paragraphmean?

A.Diary

B.Composition

C.Poem

D.Newspaper

题型:问答题 简答题

在一个1L的密闭容器中,加入2molA和1molB,发生如下反应:已知2S(g)+O2(g)2SO3(g)

ΔH=-197kJ/mol,同温下,向体积相同的密闭容器甲、乙中分别充入2molSO2、1molO2和1molSO2

0.5molO2,当反应分别达平衡时放出的热量分别为Q1和Q2(单位为kJ),则下列比较正确的是[ ]

A.Q2<1/2Q1<98.5

B.Q2<1/2Q1=98.5

C.1/2Q1<Q2<98.5

D.Q2=1/2Q1<98.5

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男性,67岁,3周来晕厥发作5次,拟诊为阿斯综合征。最易发生阿斯综合征的心律失常是()

A.完全性左束支传导阻滞

B.完全性右束支传导阻滞

C.三度房室传导阻滞

D.心房颤动

E.阵发性室上性心动过速

题型:问答题 简答题

某组织是一家电视机生产企业,为了提高市场竞争力申请质量管理体系认证,参照国家标准编写了质量手册和程序文件,进行了管理评审和内部质量审核。质量手册必须()。

A.由最高管理者批准发布

B.包含组织的结构图

C.表述组织的质量方针

D.规定组织的质量管理体系

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