书面表达。 

假如你是王慧，请你仔细阅读下面的招聘广告，然后根据广告中的要求写一封e-mail，介绍你的个人情况、兴趣爱好及能力。词数40~60。信的开头和结尾已给出，不计入总词数。

Students Wanted for Summer Camp

Are you a student? 

Are you good with kids?

Happy kids summer camp needs help with:

Sports

Music

Computer

Come and join us!

Dear Sir,

I want to join your Summer Camp to help the kids with sports and music._______________ 

_____________________________________________________________________________________________  ____________________________________________________________________________________________

 ____________________________________________________________________________________________

I think I can be good with the children and I hope to get your letter soon.

Yours,

Wang Hui 

函数f（x）=|${\log }_{\frac{1}{2}}x$|的单调递增区间是（　　）

设数列{a_n}的前n项和为S_n，已知数列{S_n}是首项和公比都是3的等比数列，则{a_n}的通项公式a_n=____