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共22小题，约2580字。
　　河北省南宫中学2011届高三年级12月考试
　　数学试题（理科）
　　一、选择题：本大题共12小题，每小题5分，共60分，四个选项只有一项
　　1．集合A={－1，0，1}，B={}，则AB= （    ）
　　A． {0}   B． {1}        C．{0，1}     D．{－1，0，1}
　　2．已知，且为实数，则等于 （    ）
　　A． 1          B．     C．            D．
　　3．使不等式成立的一个必要不充分条件是 （    ） 
　　A．   B．    C．  D． ，或 
　　4．在等比数列的值为 （    ） 
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             　　      A．9            B．1 C．2 D．3
　　5．以双曲线的中心为顶点，右焦点为焦点的抛物线方程是 （    ）
　　A．       B．     
　　C．     D． 
　　6． 现将10个参加2009年全国高中数学竞赛的名额分配给某区四个不同学校，要求一个学校1名，一个学校2名，一个学校3名，一个学校4名，，则不同分配方案种数共有 （    ）
　　A．43200    B．12600      C．24      D．20 
　　7．定义运算：，将函数的图象向左平移（）个单位，所得图象对应的函数为偶函数，则的最小值为 （    ）
　　A．    B．             C．       D．
　　8． 在空间给出下列四个命题：
　　①如果平面内的一条直线垂直于平面内的任意一条直线，则⊥；
　　②如果直线与平面内的一条直线平行，则∥；
　　③如果直线与平面内的两条直线都垂直，则⊥；
　　④如果平面内的两条直线都平行于平面，则∥．其中正确的个数是 （    ）
　　Ａ．　　　 Ｂ．　　 Ｃ．　　 Ｄ．
　　9．用数1、2、3、4、5可以组成没有重复数字，并且比20000大的五位偶数共有 （    ）
　　A．48个       B．36个          C．24个     D．18个
　　10．已知，直线与直线互相垂直，则的最小值等于 （    ）
　　A．1     B．2     C．     D．
　　11．已知、是椭圆长轴的两个端点，是它短轴的一个端点，如果与的夹角不小于，则该椭圆的离心率的取值范围是 （    ）
　　A．     B．     C．      D．
　　12．已知是定义在上的增函数，函数的图像关于点对称，若对于任意的，不等式恒成立，则当时，的取值范围是