简述面网规律。

质量为m、电量为q的质点，在静电力作用下以恒定的速率v沿圆弧从A点运动到B点，其速度方向改变的角度为θ（弧度），AB弧长为s，则A、B两点间的电势差ϕ_A-ϕ_B=______，AB弧中点的场强大小E=______．

男性，46岁。急性阑尾炎伴阑尾穿孔手术后持续发热半个月。右上腹及右肋缘下疼痛，并向右肩部放射。腹部X线平片：右膈肌膨隆，可见局限性液平。X线胸片：右侧胸腔积液。根据患者情况，首先要考虑的术后并发症是（）

A.腹腔感染

B.右膈下脓肿

C.右肺部感染

D.右膈上脓肿

E.高位肠间脓肿

I was painfully shy as a child. In high school I would avoid participating in class discussions. I was too afraid to talk to anyone but my closest friends~ I would think about being less shy, wanting the courage not only to ask a girl out, but to speak up in class and say what I was thinking. Yet, it never happened. Fears showed themselves in such self-conscious questions as, " What will other people think?  What if she says no?" I felt a dark presence in my mind holding me back.

This shyness continued into college. One day, the question occurred to me: Is life shy?

The thought surprised me ! Think of the leaves bursting out in the spring time, the bird singing at dawn, the sheer number of different forms of life, all expressing the wideness and scope of divine life. There's nothing shy about it. Life is everywhere and attention-grabbing (引人注意的). So, if my creator isn't shy about all the life that needs expressing, I don't need to be either.

I realized that if I wanted to overcome fear and shyness, I would have to put this law of life into practice~ Shyness, fear, and loneliness were hindering me from living my life as life: God wanted me to live it. Therefore, I decided to live how life saw me.

One example: I wrote a note to a girl, asking her out on a date. Even as I was writing it, the fears of disaffirmation and unworthiness came to me. This time however, instead of shrinking back and hiding from the fear, I put the note in the campus mail in spite of myself. I thought: whether she says yes or no, it's still right for me not to be shy. I can live with the confidence sent from the source of my life. The girl saw me in class the next day and told me that she would love to go out with me. I should not have been so surprised!

Bit by bit, I was proving that the limited view of myself no longer had control over me.  After college, I worked as a newspaper reporter, earned an advanced degree in theater, became a productive writer (a lifelong dream), met a special woman whom I married, and even got a job teaching at a university.

小题1:The writer was shy as a child because of______.

A．awareness that life is shy

B．lack of courage to speak out in public

C．fear of others' attitude and reaction

D．failure in his participation in class discussion小题2:"The law" in Paragraph 4 refers to the fact that______.

A．life is attention-grabbing and divine

B．God treats everything and everyone fairly

C．everything in nature is in the favour of God

D．the creator of life which needs expressing isn't shy小题3:It can be learnt from Paragraph 5 that the writer______.

A．didn't hesitate before sending the note

B．wouldn't regret sending the note despite the result

C．was not surprised when the girl agreed to go out

D．believed in God and felt encouraged by the wideness of life小题4:The underlined word "disaffirmation" in Paragraph 5 probably means______.

A．rejection

B．laughter

C．regret

D．horror小题5:The purpose of writing the text is to______.

A．blame those who are shy and unconfident

B．persuade people to have confidence in their career

C．share the personal experience with the readers

D．prove that the overcome of shyness helps achieve success

在雷电现象中，打雷是_________能转化为_________能；闪电是__________能转化为__________能。

有几个年轻的学生向往冒险，很羡慕那些背包旅行的“驴友”， (71) 。他们买来地图，在地图上清晰地画出了一条探险线路，还准备好了指南针、绳子、刀等工具和一些食品，然后便出发了。

可他们探险时突然遇到了恶劣天气，进山的路被多处洪流隔断。他们捧着指南针在山里转来转去，不断地走到岔路上， (72) ，他们渐渐地有些绝望了。

正当大家一筹莫展的时侯，他们遇到了一位猎人。猎人说：“以后进山前必须准备好几条出山的路， (73) !”

一个年轻人不服气地说：“我们有指南针， (74) ，就一定能走出去，这只不过是迟早的问题!”

猎人笑了笑说：“只知道方向有什么用 方向会告诉你哪里的小溪涨水过不去吗 方向能告诉你哪条深谷太陡下不去吗 知道了方向，还要知道适合自己走的路， (75) 。”

是啊，也许花了很长时间能够找到正确的路，但是人生中能有多少时间来给你盲目地转悠呢

A．可就是找不到出山的道路

B．这样才能达到预定的目标

C．于是约定一起去深山探险

D．只要我们能够确定好方向

E．否则你们会困死在山里的