（10分）植物具有向重力生长的特性，下列是研究根向重力生长机理的两个实验。
实验一：将空白琼脂和含EDTA的琼脂做成帽状，分别套在甲、乙两组玉米胚根的根冠外（示意图如下）。提示：EDTA的作用是去除与其临接部位的 Ca²⁺。

将胚根水平放置培养一定时间后，观察到甲组胚根向重力（下）生长，乙组胚根水平生长。根据上述实验结果，得出实验结论：                               。
　　实验二：水平放置的胚根弯曲向下生长，与根冠近地侧的Ca²⁺浓度明显高于远地侧有关。研究表明，根总是朝着Ca ²⁺浓度高的方向弯曲生长。为验证这一结论，有人设计了下列实验方案。请根据提供的实验材料和用具，写出第二步及以后的实验步骤和实验结果，并回答问题。
（1）实验材料和用具：胚根等长的萌发玉米种子，空白琼脂帽，含EDTA的琼脂帽，上面部分含Ca²⁺的琼脂帽（水平方向），培养皿等。
（2）实验步骤：
　　第一步：取若干个培养皿，在每个培养皿中放置适量的萌发玉米种子，按实验一中乙组的方法处理胚根一定时间后，移去根冠外的琼脂帽。然后将培养皿平均分成两组，编号为 A组、B 组。 
　　第二步：                                                            。
　　第三步：                                                            。
（3）实验结果：                                                         。
（4）科学家进一步证实，根冠中生长素的分布受Ca²⁺浓度影响，当胚根水平放置时，重力诱导Ca²⁺向根冠下侧移动，导致近地侧的生长素浓度比远地侧高。请分析胚根的生长素分布与向重力生长的关系：                                  。

2012伦敦奥运会即将拉开序幕，奥组委决定面向中国招募几名翻译志愿者和记者。假如你是王华，16岁，现是杭州市某初中的初三年级的一名学生，请根据自己感兴趣的志愿者工作给伦敦奥组委写回信，应征其中的一项志愿者工作。

回信中要求包括如下内容：1、个人信息：名字(Wang Hua)，年龄(16)，身份(学生)；2、你的性格特点；3、你的兴趣、爱好、特长；4、你的相关经历。
  注意：1.内容必须包括要求中的信息；

2. 开头已经为你写好，你只需接着写；

3.词数：70个左右。开头和结尾部分的内容不计入总词数。

参考词汇：翻译者（translator）

Dear 2012 Olympic Committee,
　　I am writing to apply for a position at your Volunteer Post. ________________________

_______________________________________________________________________________

_______________________________________________________________________________

_______________________________________________________________________________

_______________________________________________________________________________

_______________________________________________________________________________

_______________________________________________________________________________

______________________________________________________________________         

                                           

2012伦敦奥运会即将拉开序幕，奥组委决定面向中国招募几名翻译志愿者和记者。假如你是王华，16岁，现是杭州市某初中的初三年级的一名学生，请根据自己感兴趣的志愿者工作给伦敦奥组委写回信，应征其中的一项志愿者工作。

回信中要求包括如下内容：1、个人信息：名字(Wang Hua)，年龄(16)，身份(学生)；2、你的性格特点；3、你的兴趣、爱好、特长；4、你的相关经历。
  注意：1.内容必须包括要求中的信息；

2. 开头已经为你写好，你只需接着写；

3.词数：70个左右。开头和结尾部分的内容不计入总词数。

参考词汇：翻译者（translator）

Dear 2012 Olympic Committee,
　　I am writing to apply for a position at your Volunteer Post. ________________________

_______________________________________________________________________________

_______________________________________________________________________________

_______________________________________________________________________________

_______________________________________________________________________________

_______________________________________________________________________________

_______________________________________________________________________________

 

  

Wang Bing’s father began smoking when he was a freshman ( 大学一年级学生)in college. His friend passed him his first cigarette. He has now been smoking for more than 30 years.
It’s a classic example of how young people are introduced to cigarettes, except that nowadays smokers develop their habit at an even younger age.
It has become a major concern(担忧) in China that many teenagers begin to smoke. A survey showed that 22.5% of the middle school students questioned had tried smoking and 15.8% of them smoked regularly.
For many teenagers, smoking is a symbol of being an adult, independence, maturity(成熟) and attractiveness because the images who they love best often smoke on screen.
The social environment also plays an important role in attracting teenagers to smoking. They are used to seeing their elders, especially male family members, smoking at home. Many of them imitate adult behavior and become new smokers.
To increase the price of cigarettes is an effective way to reduce the number of young smokers, as teenagers have limited money to spend on them.
Another way is to educate the teenagers to voluntarily refuse cigarettes. A survey shows that 92.5% of the students know smoking will be bad for their health. If we persuade them in a proper way, most of them may give up smoking.
All in all, the society, the government, the school and the family should join together to take the responsibility for an anti-smoking (禁烟) campaign aimed at teenagers, not just to put empty slogans and warnings on cigarette packs.
【小题1】The writer uses the first paragraph to ______.
A. tell the readers a story of a smoker
B. introduce the topic of the passage
C. introduce the college life of Wang Bing’s father.
【小题2】What’s the main idea of this passage?

A．The teenagers think smoking is a symbol of being an adult and independence.

B．The social environment encourages the teenagers to smoke.

C．The teenagers should be educated to refuse to smoke.

D．The teenage smoking has become a serious problem in China.

【小题3】What does the word ”imitate”in Paragraph 5 mean in Chinese?

A．指责

B．忍受

C．模仿

D．支持

【小题4】From the underlined part of the last sentence of this passage, we can infer(推断) that the writer thinks putting slogans and warnings on cigarette packs is ______to solve the problem.

A．not enough	B．of no use
C．of great help	D．of great importance.