文档介绍：数学试题第1页(共5页)机密★启用前湖南省2011年普通高等学校对口招生考试数学试题时量120分钟总分:120分一、选择题(在本题共10小题,每小题4分,共40分。在每一小题给出的四个选项中,只有一项符合题目要求的)1、不等式( 2)( 1) 0x x? ??的解集是·································································()(A)( 1, 2)?(B)( , 1) (2, )??? ???(C)[ 1, 2]?(D)( , 1] [2, )??? ???2、方程20x px q? ??有解的充要条件是··························································()(A)24 0p q? ?(B)24 0p q? ?(C)24 0p q? ?(D)24 0p q? ?3、下列函数中为指数函数的是·········································································()(A)2y x?(B)2xy?(C)2y x?(D)2logy x?4、曲线1sin 22y x? ?,[0, ]x??与直线1y?的交点个数为································()(A)0(B)1(C)2(D)35、设复数(2 )z i i? ?,则下列命题正确的是·······················································()(A)z的实部为2(B)| | 5z?(C)1 2z i? ?(D)23 4z i???6、数列{ }na的前n项和23 2nS n? ?,则1 4,a a的值依次为···································()(A)1,21(B)13,46(C)1,46(D)3,217、已知方程2 219 4x yk k? ?? ?表示双曲线,则k的取值范围是································()(A)4k?(B)4k?(C)9k?(D)4 9k? ?8、设,a b为直线,?为平面,则下列选项能判定a??的条件是·········