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23.  Most of us found _____ difficult to finish the work in such a short time.

A  this          B  which         C  what        D  it

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22.  The girl’s final success _____________ the effort she had made and the courage she always had.

A  contributed to                               B  turned into  C resulted from     D resulted in

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21.  Linda _____________ at home now, but I’m not sure. Why not have a try?

A  must be   B  might have been   C  may have been  D  might be

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20.  The doctor is not quite sure about what ________ the head injury will have on the patient. It may even cause brain damage.

   A  affect       B  effect          C  affection    D  effective

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第一节  单项填空 (共10小题;每小题1分,满分10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,并在答题卡上将该项涂黑。

例  It is generally considered unwise to give a child _____he or she wants.

A  however       B  whatever          C  whichever      D  whenever

答案是B。

19. Interest, as well as prospects(前景),      important when one looks for a job.

   A  are          B  were          C  is           D  was

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21.(本题满分14分)

已知离心率为的椭圆C:的左焦点为F,上顶点为E,直线EF截圆所得弦长为.

(1)求椭圆C的方程;

(2)过的直线与椭圆C交于不同的两点AB.试探究的取值范围.

安徽省宿州市2010年高三第三次教学质量检测

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20.(本题满分13分)

设数列的前项和为.

(1)求证:数列为等差数列;

(2)设数列的前项和为,证明:.

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19.(本题满分12分)

已知函数.

(1)讨论函数的单调区间;

(2)若对于任意的恒成立,求实数的取值范围.

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18.(本题满分12分)

已知四边形ABCD为直角梯形,

为等腰直角三角形,平面PAD平面ABCDEPA的中点,.

(1)求证:BE平面PDC

(2)求证:平面

(3)求三棱锥B---DEP的体积.

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同步练习册答案