23. Most of us found _____ difficult to finish the work in such a short time.
A this B which C what D it
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
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
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
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
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A、B,.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
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:.
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.
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ABCD,E为PA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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