世博会志愿者知识抢答赛,比赛规则答对一题得10分,答错一题扣5分小强抢答了12题得了45分.小强答对了多少题?

中国2010年上海世博会志愿者标志的主体由汉字“心”、英文字母“V”、嘴衔橄榄枝飞翔的和平鸽构成.与世博会会徽“世”异曲同工,在呈现中国文化个性的同时,表达了志愿者的用“心”和热“心”.“V”是英文“Volunteer”的首字母,阐述了标志所代表的群体,赋予其清晰的含义；飞翔的和平鸽代表上海,也象征和平友爱,橄榄枝则寓意可持续发展和希望,传承“城市,让生活更美好”的世博会主题.彩虹般的色彩,迎风飘舞的彩带,是上海热情的召唤.我们相信,2010年,在志愿者的努力下,来自世界各地的人将融洽地聚集在同一片天空下!
The denotational main body of Chinese Shanghai World's Fair in 2010 volunteer is composed of the Chinese character "heart" ,English letter "V" ,mouth rank olive branch flight dove of peace.The "world" achieves the same goal with different means with World's Fair emblem,while displaying Chinese culture individuality,the use "heart" and the hot "heart" having expressed a volunteer."V" has been English "Volunteer" initial ,has set forth group represented by sign ,has given it's limpid import to; The dove of peace flying represents Shanghai ,can't symbolize friendly affection peaceful,the olive branch is implied meaning sustainable development and hope,Smriti "city,dodge the finer " World's Fair subject living.The color as rainbow ,the colour bar whirling about in the wind,are enthusiastic calling of Shanghai.We believe in ,the people who comes from world everywhere under volunteer's effort in 2010,assembles harmonious field under the same the movie sky .

我的姐姐是世博志愿者，我特别羡慕她。姐姐工作的第一天，我便来到了世博场馆，想情亲身体验一下姐姐的工作。 进入C片区，在“指路站”里我看见了姐姐，得到姐姐的同意后，我走进了休息室，开始观察姐姐一天的工作。 一开始，一位妇女抱着一位小婴儿，焦急的旬问姐姐：“小姑娘，哪里有租借婴儿推车？”“在母婴休息室旁有。”姐姐回答。“谢谢！”妇女感激道。妇女见姐姐累得很，就递上一瓶饮料，姐姐婉言谢绝了她。 送走了妇女，不一会儿，一位大哥哥，粗缛的向姐姐问道：“喂！沙特馆在哪？”他口齿不清。姐姐也许没听清楚，于是她笑容满面得问：“对不起，我没听清，请再说一遍。”“你有没有脑子啊！沙——特——馆——在——哪！”他显然十分不耐烦，每个字都拖得很长。但姐姐并没有生气，仍微笑着答：“往前走，然后左拐。”大哥哥一见姐姐仍笑着，便红着脸，羞愧的低下头，小声说道：“谢谢。” 天使那样的热，坐在休息室里的我都已经满头大汗了，姐姐的T恤已经湿透了，可她仍满脸微笑，用自己火一般的热情迎接五湖四海的宾客。 看到这，我不由感慨：世博志愿者的工作真不容易。可是，他们虽然辛苦，却十分快乐。因为他们要为世博会献出自己的一份绵薄之力！

I would like to be a volunteer in my spare time. My reasons are as follows:
First of all, it is a good virtue to help others, even in modern society. We all need others’ help in case we get into trouble. Secondly, we are able to better ourselves by helping others because we gain valuable experience and build up our confidence while serving others. What’s more, volunteering makes us feel better about ourselves, thus making our life more enjoyable. More importantly, we can make the world a better place to live in by volunteering to improve it.
In summary, volunteering can make a difference to our life, so I think it is very rewarding to be a volunteer.

略

To enter the exhibition hall of Saudi,you need to stand in line and wait more than 9 hours.We recommend that you visit other halls,for they also have their unique characteristics.
保证手工翻译…鄙视机译

The World Expo is a large-scale, global, non-commercial Expo. The hosting of the World Expo must be applied for by a country and approved by the international World Expo committee. Expo aims to promote the exchange of ideas and development of the world economy, culture, science and technology, to allow exhibitors to publicise and display their achievements and improve international relationships. Accordingly, the World Expo with its 150-year history is regarded as the Olympic Games of the economy, science and technology. Shanghai will host the 2010 World Expo.
The World Expo has a long history but it has never been held in Asia. So the 2010 World Expo is an honor for all of the Asians. Our government has promised that it will be the best one. And Shanghai, as a host city, will have more chances to develop quickly. As a student in Shanghai, I should learn English well so that I can be a volunteer in the Expo to help foreigners know more about china and Shanhai.
引自：http://zhidao.baidu.com/link?url=5jSIFKx-qPAyA6aMdlwJ2ckRrCUHHxyaSeqMYOiQeyVdnQCh0FuqpekQEtvqWA-AXMB3PWaiauXEIi_kr8cQia

it is so easy!i think you can finish it perfectly.

解题思路：（Ⅰ）本题是一个等可能事件的概率，试验发生包含的事件数C₅²A₄⁴，满足条件的事件是甲、乙两人同时参加A岗位服务有A₃³种结果，得到概率．
（Ⅱ）由题意知本题是一个等可能事件的概率，试验发生包含的事件数C₅²A₄⁴，满足条件的事件数是4个元素的全排列，得到概率．
（Ⅲ）随机变量ξ可能取的值为1，2．事件ξ=2是指有两人同时参加A岗位服务，根据等可能事件的概率公式得到结果，然后用1减去得到变量等于1的概率．

（Ⅰ）由题意知本题是一个等可能事件的概率，
试验发生包含的事件数C₅²A₄⁴
满足条件的事件是甲、乙两人同时参加A岗位服务有A₃³种结果，
记甲、乙两人同时参加A岗位服务为事件E_A，
∴P(EA)＝

A33

C25
A44＝
1
40，
即甲、乙两人同时参加A岗位服务的概率是 [1/40]．
（Ⅱ）由题意知本题是一个等可能事件的概率，
试验发生包含的事件数C₅²A₄⁴
记甲、乙两人同时参加同一岗位服务为事件E，那么 P(E)＝

A44

C25
A44＝
1
10，
∴甲、乙两人不在同一岗位服务的概率是 P(
.
E)＝1−P(E)＝
9
10．
（Ⅲ）随机变量ξ可能取的值为1，2．事件“ξ=2”是指有两人同时参加A岗位服务，
则 P（ξ=2）=

C25
A33

C25•
A44=[1/4]．
所以 P(ξ＝1)＝1−P(ξ＝2)＝
3
4．
∴ξ的分布列为：

ζ 1 2
P [3/4] [1/4]∴数学期望Eξ=1×
3
4+2×
1
4=[5/4]．

点评：
本题考点： 离散型随机变量的期望与方差；等可能事件的概率．

考点点评： 本题考查等可能事件的概率，解题的关键是看清试验发生包含的事件数和满足条件的事件数，可以用排列组合表示出来，有的题目还可以列举出所有结果．

不正确.
莘莘 是‘众多’的意思,和‘们’重复了

trained ... be

Dear Tim,
I’ve received your email, asking me about the summer vacation. Now let me tell you something exciting.
I worked as a volunteer for the Shanghai Exposition during the summer vacation.
The expositions a grand international gathering, which is expected to attract 70 million visitors from both home and abroad. And what makes it unique is that it is held in a developing country for the first time. Can you imagine how proud I feel to be able to do my bit for this special occasion?
Speaking of the volunteer work, I mainly helped out in Beijing Pavillion, where I showed the visitors around and introduced the magnificent buildings to them, such as the Forbidden City, which helped the visitors to get to know about the culture of Beijing. Apart from my work as a volunteer, I paid a visit to different pavilions. By seeing the great inventions and achievements on display I experienced different cultures.
Sounds fantastic, doesn’t it?
I hope you can see it for yourself.
Fondly Yours,
Li Hua

略

Shanghai World Expo volunteers will be divided into ten categories, 38 kinds of jobs; Service Expo, according to the time period to distinguish, the Expo volunteers can be divided into "the preparation of volunteers" and "operation of volunteers," two categories . Among them, the "preparation of volunteers" to serve the World Expo in Shanghai before the opening of large scale promotion activities, important meetings. And for the "operation of volunteers", Shanghai World Expo organizers initially estimated, then served in the Expo area of not less than 200,000, the general volunteer time span of continuous service of not less than seven days.
Namely: 1 • 2 • visitor services to help run venues to help 3 • 4 • news reports to help run activities, traffic management assistance to help 5 • 6 • 7 • Concierge services to assist public reception volunteer management assistance to help 8 • 9 • administrative assistance to 10 Expo Village management assistance

The World Expo in 2010
The World Expo in 2010
Shanghai will host the 2010 World Expo.The World Expo has a long history but it has never been held in Asia.So the 2010 World Expo is an honor for all of the Asians.()ur government
has promised that it will be the best one.And Shanghai,as a host city,will have more chances to develop quickly.As a student in Shanghai,I should learn English well so that I can be a volunteer in the Expo to help foreigners know more about Shanghai.

D

略

The World Expo in 2010 Shanghai will host the 2010 World Expo.The World Expo has a long history but it has never been held in Asia.So the 2010 World Expo is an honor for all of the Asians.Our governme...

What can I do for the 2010 Shanghai World Expo?
We all know that the Expo 2010 will be held in Shanghai.Being citizens of Shanghai,we fell proud and responsible.It is said there will be 7,000 visitors from different countries coming to Shanghai.What can I do for the Expo 2010 at that time?
There is no doubt that I will be a volunteer to give services to the Expo 2010.I am good at English and I can communicate fluently with foreign guests.I must study English even harder so that I can introduce to them in English the rapid development of Shanghai and I can also help them.I can make them feel at home in Shanghai,such as showing them the way to their hotels or to the places of interest in Shanghai.
In a word,I will keep in mind the theme of the Expo 2010 “Better City,Better Life” and do my best for the great festival.

World is in front of you,we are with you.

7 设答对了X题,那么答错了（12—X）题.
10X-（12-X)*5=45
10X-(60-5X)=45
10X-60+5X=45
15X-60=45（加油吧）
X=105/15
X =7

这有很多啊!比如说：你可以维持秩序或者是向游客介绍每个馆的知识······