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（本題12分）定義在R上的函數，已知在上有最小值3。

（1）求的單調區間；

（2）求在上的最大值。

下面來自哥本哈根的一則報道：

COPENHAGEN：No matter what the outcome of the UN climate change conference is, China will remain committed（盡…義務）to achieving the emission reduction targets（減排目標）it has said for itself, Premier Wen Jiabao said on Friday．

“We will honor our word with real action，”Wen told 119 heads of state and government attending the UN climate change conference，or COP 15．

Before the conference began，China announced that it would reduce its carbon intensity emission by 40 and 45 percent by 2020．

Wen then met US President Barack Obama for nearly an hour in what a White House official described as a“step forward”．“But Obama refused to commit to new emission cuts, a move that many said could have saved the struggling climate talks．

假如你叫李華，在看完這則報道后用英語給出席“哥本哈根聯合國世界氣候變化大會”（Copenhagen）The 15th United Nations Climate Change Conference，or COP 15的各國首腦寫封信，代表中國的中學生陳述你們對世界環境問題的關注和對本次大會的期待。文章應包括以下要點的內容，不必逐字翻譯，字數在120左右．

1．經濟發展決不能以犧牲環境為代價，降低排放，減少溫室效應（green house effect）是本世紀人類面對的最大挑戰．（challenge）

2．幾十年來，中國政府在改善環境方面的努力有目共睹，本次大會，中國提出了最高的減排目標，起了帶頭作用．

3．自己親身體驗到了學校周邊自然環境的變化．

4．發達國家應當有勇氣承擔更多的責任

5．作為未來的主人，真誠希望各國的領導人立即行動起來，共同合作，不要把問題留給下一代人．

開頭已寫出：

Dear Sirs／madams，

As Chinese teenagers，we are most concerned about the opening of COP 15 in Copenhagen

閱讀下面短文，然后按要求寫一篇150詞左右的英語短文
In China,with one or two parents going out to earn money,many children are left in their hometown in the countryside.These children are called “leftover children”.A large number of leftover children have emerged since 1978,and the statistics showed in 2004,the total was 22 million.
Usually their grandparents or their parents’ friends or relatives look after these leftover children.Sometimes they are brought up by one of their parents at home.In most cases,their guardians are not quite educated.To them,making sure that the children are healthy and fed well is the most important task,and that the children are safe and sound is considered to have done a good job.But they seldom care about children’s study,their psychological needs,or mental demands.Neither do they spend some time teaching kids how to develop good habits.
Therefore,for most of the time,the leftover children can’t get emotional support from their parents,which can result in so many problems.
【寫作內容】
1.以約30個詞概括短文的要點；
2.然后以約120個詞就“如何關心農村留守兒童（leftover children）的成長？”的主題發表看法，并包括如下要點：
（1）農村留守孩子存在的原因；
（2）你認為他們面臨的最大困難是什么；
（3）解決留守兒童問題的關鍵是什么；
（4）提出解決問題的措施。
【寫作要求】
1.你可以使用實例或其他論述方法支持你的論點，也可以參照閱讀材料的內容，但不能直接引用原文的句子；
2.題目自定。
【評分標準】
概括準確，語言規范，內容合適，篇章連貫。

近來你班上同學關系不太融洽，老師要求你在班會上就“友誼”發表講話，鼓勵大家要珍惜友誼，包括如下內容：

1. 友誼是人與人的關系，交朋友是人的本性（instinct）；

2. 友誼的作用：有困難時友誼如何給我們予幫助；成功時朋友可以分享幸福；

3. 友誼是我們的最大快樂之一，在人生道路上沒有得到友誼，就沒有真正地擁有生活。

4. 號召大家要珍惜友誼。

【寫作要求】

    只能使用5個句子表達全部內容。

讀寫任務（共1小題，滿分25分）
在全國“兩會”上，“農村留守兒童” 問題成為人大代表和政協委員普遍關注的熱門話題之一。請閱讀下面的短文，然后按照要求寫一篇150詞左右的英語短文。
In China, with one or two parents going out to earn money, many children are left in their hometown in the countryside. These children are called “leftover children”. A large number of leftover children have emerged since 1978, and the statistics showed in 2004, the total is 22 million.
Usually their grandparents or their parents’ friends or relatives look after these leftover children. Sometimes they are brought up by one of their parents at home. In most cases, their guardians are not quite educated. To them, making sure that the children are healthy and fed well is the most important task, and that the children are safe and sound is considered to have done a good job. But they seldom care about children’s study, their psychological needs, or mental demands. Neither do they spend  some time teaching kids how to develop good habits.
Therefore, for most of the time, the leftover children can’t get emotional support from their parents, which can result in so many problems.
[寫作內容]
1. 以大約30個詞概括短文的內容。
2. 然后以約120個詞就“如何關心農村留守兒童（leftover children）的成長？”的主題發表看法，并包括如下要點：
1）農村留守孩子存在的原因是什么。
2）你認為他們面臨的最大困難是什么。
3）解決留守孩子問題的關鍵是什么, 提出解決問題的措施。
[寫作要求]
1. 你可以使用實例或其他論述方法支持你的論點，也可以參照閱讀材料的內容，但不能直接引用閱讀材料的句子。
2. 題目自定。
[評分標準] 
概括準確、語言規范、內容合適、篇章連貫。
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