什么是软件的系统文档？

What’s the most important thing for you to have in your life? Someboy 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 betterr 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 helpf 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

工业上利用氢气在氯气中燃烧，所得产物再溶于水的方法制得工业用盐酸，流程复杂且造成能量浪费。有人设想利用原电池原理直接制盐酸的同时，获取电能，假设这种想法可行，下列说法肯定错误的是[ ]

A．两极材料都用石墨，用稀盐酸做电解质溶液

B．通入氢气的电极为原电池的正极

C．电解质溶液中的阳离子向通氯气的电极移动

D．通氯气的电极反应式Cl₂+2e^-==2Cl^-

调节眼压的最主要因素是（）

A.房水

B.玻璃体

C.晶状体

D.眼球内容物

E.眼球壁的硬度

如图所示，一玩滚轴溜冰的小孩（可视作质点）质量为m=30kg，他在左侧平台上滑行一段距离后平抛，恰能无碰撞地沿圆弧切线从A点进入光滑竖直圆弧轨道，并沿轨道下滑，A、B为圆弧两端点，其连线水平．已知圆弧半径为R=1.0m，对应圆心角为θ=106°，平台与AB连线的高度差为h=0.8m  （计算中取g=10m/s²，sin53°=0.8，cos53°=0.6）求：（1）小孩平抛的初速度（2）小孩运动到圆弧轨道最低点O时对轨道的压力．

《体育与健康课程》内容的基础表现为：《课标》规定必修的2个学分分别是（）。

A.健康教育

B.球类运动

C.拓展训练

D.体操

E.田径运动