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25. I used to go camping a lot, so it won’t be the first time I     in a tent.

A. have slept     B. had slept     C. was sleeping     D. slept

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24. We went to Mountain Tai last weekend, ______, not surprisingly, was crowded with visitors.

 A. where       B. which       C. that       D. when

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23. The company provides cheap Internet access. _______, it makes shareware freely available.

A. In addition    B. In brief      C. In return      D. In common

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22. -Better get down to your work, Jack.

- ________ .

A. It’s my pleasure          B. Not to mention it

C. Mind your own business      D. You are welcome

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第一节 语法和词汇(共15小题,每小题1分,满分15分).

从A、B、C、D四个选项中,选出可以填入空白处的最佳选项。

21. _______ global financial crisis is   __ challenge for the whole world. Confidence, cooperation and responsibility are keys to overcoming the crisis.

A.A;the    B.A;a       C.The, the    D.The;a

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22. (本题16分)

已知函数的图像在点处的切线方程为 ,

(1)确定的值;

(2)当时,求的最小值;

(3)试讨论关于的方程: 根的个数

浙江省菱湖中学2010届高三上学期期中考试(数学理)

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21.(本题14分)

在数列中,前项和为.已知

 且( , 且).

(Ⅰ)求数列的通项公式;

(Ⅱ)  求数列的前项和.

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20. (本题14分)

一灌溉渠的过水横断面为等腰梯形,底宽2米,边坡的倾角为(),长度为米(如图),梯形面积为

(1)   当时,若不小于5平方米,求的最小整数值;

(2)   若边坡的长度为2米,则倾角为何值时,灌溉渠的过水横断面面积最大?

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