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问题 选择题

下列关于物质的分类中依次按照强电解质、弱电解质和非电解质排列全部正确的组合是[ ]

A．NaCl　 HF　 Cl2

B．NaHCO3　 NH3·H2O　 CCl4

C．Ba(OH)2　 HCl　 Cu

D．AgCl　 H2SO4　 C2H5OH

答案

答案：B

填空题

长方形和正方形的两组对边互相______，两条邻边互相______．
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单项选择题

B


Questionnaire


Read the questions and answer YES or No, then you will find out how good you are.
1. When you don’t understand something, you ask questions.
2. You like listening to older people talk about the past.
3. You think that you can learn something interesting from everyone around you.
4. You are brave enough when you have to talk to people you don’t know.
5. You enjoy reading books about famous people.
6. You always see and talk to different people.
7. You are interested in learning new ways of doing things.
8. You enjoy sharing experiences with friends and learning from people of all ages.
9. You talk a lot about yourself.
10. Even if you are often wrong, you make your own decisions.
11. You hate teaching what you are good at: sports, technology, whatever.
12. Your parents don’t understand you, so you don’t talk to them much.
SCORE NOW!
Score 2 points if you answer YES to each of the first 8 questions, and O if you choose NO.
Score 2 points if you answer NO to each of the last 4 questions, and O if you choose YES.
18—24 You are friendly and open-minded. You make people fell important by listening to what they have to say. You’ll probably succeed in learning all kinds of interesting things. Good for you!
10—16 Remember that every single person you know can teach you something. You will greatly make your life rich and colorful.
0—8 About 400 years ago, a famous writer wrote," No man is an island." This is still true today. Try to be more open and interested in people around you.

The writer thinks you should ______.

A．always see and talk to the same people

B．make your own decision whenever you want

C．enjoy teaching what you are good at

D．talk much about yourselves when possible
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