问题 选择题

2009世界女子冰壶锦标赛决赛中,中国女队以8比6战胜瑞典队,夺得冠军。某同学研究中国女队最后一次投出冰壶的运动,其受力与运动状态之间关系的说法中正确的是

A.冰壶之所以能停下来,是因为没有外力来维持它的运动状态

B.冰壶惯性的大小与其质量和加速度大小有关

C.只要冰壶的运动状态发生变化,必然受到外力的作用

D.冰壶所受外力不变时,其运动速度也不变

答案

答案:C

冰壶之所以能停下来,是因为受摩擦力,改变了原来的运动状态,A错。质量是惯性大小的唯一量度,B错。物体运动状态发生改变,一定受外力作用,C对。冰壶所受外力不变时,加速度不变,其运动速度一定改变,D错。

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 the 26 English letters alphabetically(按字母表的顺序)and use numbers to represent each of them, for example, 1 for a, 2 for b, 3 for c…, 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," while 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 or prayer(祈祷)? They 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(态度).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 times people hope for a better life. It is possible that one will have a change for the better after one has changed one’s attitude.

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(积极地)attitude towards failure(失败),you’ll find it’s also rewarding though it has caused you losses.

小题1:In the writer’s opinion , what is the most important things in a person’s life?

A.Hard-work.

B.Knowledge.

C.Money.

D.Attitude.小题2:According to the passage, if you meet with problems, the best way out is to _________.

A.ask for help from others

B.say your prayers to God

C.change your attitude

D.try maths-solving methods小题3:From the passage we can learn that ______________.

A.diffrent attitudes come from different courses of life.

B.mathematics can solve every problem easily in our daily life

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

D.none of the English words except “attitude” equals to 100 or more

单项选择题