使用湿式气体流量计应注意什么？

阅读理解

       School education is very important and useful. The students both learn  knowledge and get an

education. Yet,no one can learn everything from school. The scientists, such as Edison, Newton,

Galileo and Einstein, didn't learn everything from school. They learned a lot of knowledge outside

school or in practice by themselves. A teacher,even he knows a lot,can't teach his students everything.

      The teacher's job is to show his students how to learn, how to read, and how to think. A good

teacherwith rich experience in teaching can teach his students the methods ( = ways) of study.

Through these methods the students are able to learn and get a lot of things by themselves.

      Usually it is very easy for the students to remember some knowledge, but it is very difficult to

use it for problems. If a teacher really shows the students the ability to use knowledge, it means the

teacher has learned lots of  knowledge by himself ( or herself). The success in learning shows he or

she knows how to study.

1. From the passage we know       .

A. the students are taught everything at school

B. a teacher can't teach the students everything

C. school is really not important and useful

D. Edison learned lots of knowledge at school

2. A teacher's job is        .

A. to help the students with their lessons

B. to teach the students everything

C. to show the students how to study by themselves

D. to tell them the way to study

3. Choose the right order of this passage.

a. How important are the study methods for students?

b. What does the teacher's experience of success in study mean?

c. Where should the students study?

d. What's the job of a teacher?

A.cabd    

B.bcad    

C.cbda    

D.cdab

4. Which of the following is right?

A. If we know how to learn, we can get a lot of knowledge.

B. We can learn everything from the teacher.

C.The writer tells us that practice is more important for the students than learning.

D. It is the only job for the students to learn knowledge.

5. Which of the following is the best title?

A. A real job for teachers

B. Study in and outside school

C. Practice is the only way of learning

D. How to leam knowledge

一个木工厂要做2350套家具，已经做了25天，每天做70套，还剩多少套没有做？

肾结石的超声表现为（）

A.肾实质内强回声团伴声影

B.肾实质内强回声团无声影

C.肾窦内强回声团伴声影

D.肾内无回声区，后方伴声影

E.肾盂积水

设有关系模式S(Sno, Sname, Pno, Pname, Q, A)表示销售员销售商品情况，其中各属性的含义是：Sno为销售员员工号，Sname为销售员姓名，Pno为商品号，Pname为商品名称，Q为销售商品数目，A为销售商品总金额，根据定义有如下函数依赖集：P=Sno→Sname，Sno→Q，Sno→A，Pno→Pname

关系模式S的关键字是（1），W的规范化程度最高达到（2）。若将关系模式S分解为3个关系模式$1(Sno, Sname, Q, A), S2(Sno, Pno, Pname)，则S1的规范化程度最高达到（3），S2的规范化程度最高达到（4）。

SQL中集合成员资格的比较操作“元组IN(集合)”中的“IN”与（5）操作符等价。

（2）是（）

A.1NF

B.2NF

C.3NF

D.BCNF

患者男性，43岁，近半年来感到生不如死，度日如年，并坚信自己做错了很多事，罪恶深重，决定自杀。

该表现属于

A．妒忌妄想
B．罪恶妄想
C．夸大妄想
D．关系妄想
E．物理影响妄想