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24. Maria was thoroughly embarrassed, _____ her parents treated her like a child.

  A. and           B. for         C. but            D. or

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23. --- Is there anything wrong with my heart?

  --- ______ . Take it easy.

  A. Nothing serious  B. That’s right   C. Don’t mind   D. Keep calm

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22. My summer job wasn’t ____ fun, but it was ____ real learning experience for me.

  A. a; a      B. the ; /          C. / ; a           D. a ; /

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第一节:单项选择(共15小题;每小题1分,满分15分)

21. As is known, it was Hu Jintao, ____ president of our nation, who gave ____ lecture at the opening ceremony.  (学生命题)

  A. the ; a     B. the ; /          C. a ; the           D. /; a

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21、(本小题满分13分)已知函数的定义域为, (1)求M (2)当 时,求 的最小值.

贵州省兴义市龙盘中学2010届高三第一次月考

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20、(本小题满分13分)已知定义域为R的函数是奇函数.

(1)求a,b的值;

(2)若对任意的,不等式恒成立,求k的取值范围.

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19. (本题13分)某造船公司年造船量是20艘,已知造船艘的产值函数为R(x)=3700x+45x2-10x3(单位:万元),成本函数为C(x)=460x+5000(单位:万元),又在经济学中,函数f(x)的边际函数Mf(x)定义为Mf(x)=f(x+1)-f(x)。

(Ⅰ)求利润函数P(x)及边际利润函数MP(x);(提示:利润=产值成本)

(Ⅱ)问年造船量安排多少艘时,可使公司造船的年利润最大?

(Ⅲ)求边际利润函数MP(x)单调递减时x的取值范围,并说明单调递减在本题中的实际意义是什么?

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18.(本小题满分12分)已知函数满足且对于任意, 恒有成立.

  (1)求实数的值;   (2)解不等式.

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