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24.When she was awake, she found that she was lying on    seemed to be a piece of stone.

    A.that           B.which         C.what          D.it

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23.--- I did very badly in the exam this time, so I’ve very upset.

   --- Cheer up! I did     than you, but I remain happy.

    A.no better       B.better          C.no worse       D.not worse

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22.In the Beijing Olympics, Phelps from the US is     person of wonder,    person who swam  into the Olympic history.

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

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第一节:单项填空(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.--- Please tell Bruce he has won the first prize in the maths contest.

   ---      He never did so well before.

    A.Congratulations!                  B.Good luck!

    C.That’s right.                     D.What a good surprise!

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22.(本小题满分14分)已知f(x)=ax3+bx2+cx+d是定义在R上的函数,其图象交x轴于ABC,三点,若点B的坐标为(2,0),且f(x)在[-1,0]和[4,5]上有相同的单调性,在[0,2]和[4,5]上有相反的单调性.

(1)求c的值;高☆考♂资♀源?网   ☆

(2)在函数f(x)的图象上是否存在一点M(x0y0),使得f(x)在点M处的切线斜率为3b?若存在,求出点M的坐标;若不存在,说明理由;

(3)求|AC|的取值范围.

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21.(本小题满分12分) 在平面直角坐标系中,O为坐标原点,已知两点M (1,-3)、N(5,1),若点C满足   =t   +(1-t)   (tR),点C的轨迹与抛物线:y2=4x交于AB两点。

(1)求证:  ⊥   ;

(2)在x轴上是否存在一点P (m,0),使得过点P任作抛物线的一条弦,并以该弦为直径的圆都过原点.若存在,请求出 m的值及圆心的轨迹方程;若不存在,请说明理由.

高☆考♂资♀源?网   ☆

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20.(本小题满分12分)已知数列{an}的前n项和S n,且对一切正整数n恒成立.

(1)证明数列{an+3}为等比数列;

(2)数列{an}是否存在三项构成等差数列?若存在,求出一组;若不存在,请说明理由.

高☆考♂资♀源?网   ☆

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19.(本小题满分12分) 如图,在四棱维P-ABCD中,底面ABCD为正方形,PD⊥平面ABCD,且PDABaEPB的中点.

(1)求异面直线PDAE所成角的大小;

(2)在平面PAD内求一点F,使得EF⊥平面PBC

(3)在(2)的条件下,求二面角FPCE的大小.

高☆考♂资♀源?网   ☆

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