26. -Sir, you must have witnessed the man who stole my car, haven’t you?
-No, Madam, I a newspaper.
A. read B. was reading C. would read D. am reading
25. She thought it was worthwhile for her to teach in the small village to make a of the life of the children there.
A. difference B. sense C. study D. discovery
24. I can’t thank you much because without your help I have won the first prize.
A. too; wouldn’t B. very; shouldn’t
C. that; might not D. so; couldn’t
23. As he has been well trained, this young man is to be a teacher.
A. delighted B. possible C. qualified D. unable
22. we can’t remove our trouble in life for ever, we can leave them behind when we are on vacation.
A. When B. While C. Unless D. Until
第一节:语法和词汇知识(共15小题;每小题1分,满分15分)
21. It is great shock for all of us to hear news that three university students lost their lives because of saving others.
A. the ; a B. /; a C. / ; / D. a; the
22.(本小题满分14分)
已知函数
(I)求函数的图象在处的切线方程;
(II)求的最大值;
(III)设实数,求函数在上的最小值。
21.(本小题满分12分)
某市旅游部门开发一种旅游纪念品,每件产品的成本是15元,销售价是20元,月平均销售件,通过改进工艺,产品的成本不变,质量和技术含金量提高,市场分析的结果表明,如果产品的销售价提高的百分率为,那么月平均销售量减少的百分率为,记改进工艺后,旅游部门销售该纪念品的月平均利润是(元)
(I)写出与的函数关系式;
(II)改进工艺后,确定该纪念品的销售价,使旅游部门销售该纪念品的月平均利润最大
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