VI. 书面表达(满分25分)

Dear friends,

　May I have your attention please? I have an announcement to make.

That’s all! Thank you.

V．短文改错(共10小题，每小题1分，满分10分)

I used to going into the countryside to draw animals and plants, one day I

was walking across a field, looking for rabbits to draw. Lost on thought, I hadn't

noticed a bull (公牛) to running towards me. About 100 metres ahead were a

tree under which I would sit and draw. Suddenly, I heard the noise behind me. I

turned and saw the bull. I knew a bull can run more faster than a man, and I also

knew that a bull can't see very clear and notice only shape and movement.

So I ran calmly towards the tree, keep the tree, myself and the bull in a

straight line. I also threw my bag to the right, so it was out the line of the 　tree. The bull saw a sudden movement and headed to the bag. I reached the tree and climbed up it.

V．短文改错(共10小题，每小题1分，满分10分)

　 假定英语课上老师要求同学之间交换批改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。错误涉及一个单词的增加、删除或修改。

注意：1. 每处错误及其修改均仅限一词。

2. 只允许修改10处,多者(从第11处起)不计分.

　I used to going into the countryside to draw animals and plants, on one day 1 was

walking across a field, looking for rabbits to draw. Lost in thought, I hadn't noticed

a　 bull (公牛) to running towards me. About 100 metres ahead of was a tree under

which I would sit and draw. Suddenly, I heard the noise behind me. I turned and saw

the bull. I knew a bull can run more faster than a man, and I also knew that a bull

can't see very clearly and notice only shape and movement. So I ran calmly towards　

the tree, keep the tree, myself and the bull in a straight line. I also threw my bag to

the right, so it was out the line of the tree. The bull saw a sudden movement and

headed to the bag. I reached the tree and climbed up it.

21. 几何证明选讲

AB是⊙O的直径，D为⊙O上一点，过点D作⊙O的切线交AB延长线于C，若DA=DC，求证AB=2BC

22(本小题满分10分)选修4-4：坐标系与参数方程　

已知为半圆(为参数，)上的点，点的坐标为，为坐标原点，点在射线上，线段与的弧的长度均为。

(Ⅰ)以为极点，轴的正半轴为极轴建立极坐标系，求点的坐标；

(Ⅱ)求直线的参数方程

23(本小题满分10分)选修4-5：不等式选讲

　　　　 已知均为正数，证明：，并确定为何值时，等号成立。

20．(本小题满分12分)

设函数．

(Ⅰ)当时，求的最大值；

(Ⅱ)令，以其图象上任意一点为切点的切线的斜率恒成立，求实数的取值范围；

(Ⅲ)当，时，方程有唯一实数解，求正数的值

(从以下三个题中任选一个作答)

19．(本小题满分12分)

已知点A(－1，0)、B(1，0)和动点M满足：，且，动点M的轨迹为曲线C，过点B的直线交C于P、Q两点． (1)求曲线C的方程； (2)求△APQ面积的最大值．