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
24. We went to Mountain Tai last weekend, ______, not surprisingly, was crowded with visitors.
A. where B. which C. that D. when
23. The company provides cheap Internet access. _______, it makes shareware freely available.
A. In addition B. In brief C. In return D. In common
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
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
22. (本题16分)
已知函数的图像在点处的切线方程为 ,
设.
(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)
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.
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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