问题 选择题
已知函数f(x)=2sin(
π
4
+2x)cos(
π
4
+2x)
,x∈R,则f(x)是 (  )
A.最小正周期为π的奇函数
B.最小正周期为
π
2
的奇函数
C.最小正周期为π的偶函数
D.最小正周期为
π
2
的偶函数
答案

因为:函数f(x)=2sin(

π
4
+2x)cos(
π
4
+2x)

=sin2(

π
4
+2x)=sin(4x+
π
2

=cos2x.

∴f(-x)=cos(-2x)=cos2x

所以:T=

4
=
π
2
且为偶函数.

故选D.

写作题

2010年广州亚运会即将来临。为了迎接亚运,你们班级将举行一次“我与2012广州亚运”的主题班会。假如你是班长,请你就以下内容拟一个发言稿。
[写作内容]
2010年广州亚运会
1. 是21世纪初重大体育赛事之一;
2. 包括中国在内的亚洲各国都在为此做准备;
3. 亚运会的作用;
省、市政府
1. 修建体育场馆、亚运村等;
2. 美化城市;
我们中学生
1. 学好英语,争做自愿者;
2. ……
[写作要求]
1.只能使用5个句子表达全部内容;
2.文中不能出现真实姓名和学校名称;
3. 注意:发言稿的开头和结尾已给出(不计入5个句子中)。
Hello, my dear fellow classmates. Today we’re having a class meeting here whose topic is “2012 Guangzhou Asian Games & Me”.                                                                             
                                                                                
                                                                                
                                                                                                                                                                   
                                                                                                                                                                                                                                                   
                                                                                
                                                                                
Thank you for your attention and next, I hope all of you will share your idea with one another about the coming great Games.
单项选择题