10．已知实数，　　　　　　　　　　　

则的大小关系为(按从小到大排列)

9．执行如右图所示的程序框图，则输出的结果为　　　　 　　

8．古希腊人常用小石子在沙滩上摆成各种形状来研究数，比如：

　　　　 图1

图2

他们研究过图1中的1，3，6，10，…，由于这些数能够表示成三角形，将其称为三角形数；类似地，称图2中的1，4，9，16，…这样的数为正方形数。下列数中既是三角形数又是正方形数的是(　　 )

A.　 1378　　　　　 B． 1225　　　　 C．　　 1024　　　 D.　 289

6．_{七名学生站成一排，则甲、乙之间必须隔一人的不同排法的种数为 (　 　　)}

_{A. 240　 　　　　　B. 600　 　　　　　C. 1200　　　 D. 2400}

_7.下图为一个几何体的三视图，尺寸如图，则该几何体的表面积为(不考虑接触点)(　　 )

A．　　 B．　　 C．　 D．

5．已知等差数列的公差为2，若成等比数列，则=(　　 )

　 -4　　　　 　-6　　　 　-8　　　　　 　-10

4．如右图示，在长为5，宽为2的矩形中有一封闭曲线围成的阴影区域，现向矩形中随机撒300颗黄豆，数得落在阴影区域内的黄豆数为138颗，则阴影区域的面积为(　　 )

A．　　　　 B．　　　　　 C．　　　　　 D．无法计算

3．化简，其结果为(　　 )

2．已知定义在R上的奇函数满足，则(　　 )

　-1　　　　 　　0　　　 .　 1　　　　　 　2

1．已知全集，集合，，则等于(　　 )

3. 展望未来。

注意：开头与结尾已经给出，所写部分120字左右。

Dear teachers, families and graduates, welcome and thank you for joining us tonight at Xnhua High School graduation ceremony for the Class of 2010!

_____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Finally, best wishes to the Class of 2010. Thank you very much.

[参考范文]

Dear teachers, families and graduates, welcome and thank you for joining us tonight at Xinhua High School graduation ceremony for the Class of 2010!

First, let me thank all our families and friends for their love and support on behalf of the graduates. I also want to thank our diligent teachers for guiding us through to this moment. My personal thanks to Mr Zheng, you got me through Math when I had given up hope.

　　　 Graduation is a time to go over enjoyable memories which have been made over the past three years. Many events become so vivid in my mind at this moment, military training, soccer and basketball games. 　　

However, graduation is also a time to look forward to the future in front of us. No matter what you plan next, I hope you can go about it positively. Each of you will create your own unique path. Let’s remember the saying “attitude determines altitude”. Please always keep a smile on your face.

Finally, best wishes to the Class of 2010. Thank you very much.