问题 多选题
下列说法中正确的是(  )

A.物体自由下落时速度增大,所以物体内能也增大

B.1克100℃的水变为1克100℃的水蒸汽的过程中内能增大

C.物体的体积减小温度不变时,物体内能一定减小

D.悬浮在液体中的固体微粒的无规则运动是布朗运动

答案

BD

阅读理解

阅读理解。

      What's the most important thing for you to have in your life? Somebody mentions hard-work,

 others suggest knowledge, love and luck.

      If you arrange (排列) the 26 English letters in order and use numbers to represent each of them,

 for example, 1 for a, 2 for b, 3 for c…26 for z, you can change an English word into a number. So

 hard-work becomes 8+1+18+4+23+15+18+11=98, meaning 98 is its mark. Knowledge: 11+14

 +15+23+12+5+4+7+5=96, love: 12+15+22+5=54, and luck: 12+21+3+11=47, a small mark.

 None of these words can give one a full mark. What about money? It can't , either.

      Then what else? Don't be worried. You can always find an answer to a problem in your life,

 when you change your way of looking at things or doing things, or your attitude.Yes, attitude is the

 word. See for yourself: attitude: 1+20+20+9+20+21+4+5=100, a full mark.

      Different attitudes lead to different courses of life. Most time people hope for a better life. It is

 possible that they will have a better life if they chang their attitudes. When you change your manner

 and became friendly towards others, you'll meet more smiling faces towards you. In the same way,

 if you take a positive attitude towards failure, you'll find it's also rewarding (有益的) though it has

 caused you losses (损失).

1. The writer thinks _____ is the most important thing in a person's life.

 A. hard-work.

B. knowledge

C. money

D. attitude

2. What is the mark of the word money according to the passage?

A. 73

B. 72

C. 75

D. 62

3. According to the passage, if you meet with problems, the best way is to _____.

A. ask for help from others

B. hope to be lucky

C. change your attitude

D. try math-solving ways

4. From the passage we can learn that _____.

A. diffrent attitudes come from different courses of life

B. sometimes failure can bring you good if you take a positive attitude

C. math can solve every problem easily in our daily life

D. none of the English words except "attitude" is 100 or more

单项选择题 A1/A2型题