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一、选择题：本题共8小题，每小题5分，共40分.在每小题给出的四个选项中，只有一项是符合 题目要求的.

1.已知集合A={x|-4<x<3},B={x|x2+4x-12<0},          则 A∩B=

A.{x|-2<x<4}                                                           B.{x|-4<x<2}

C.{x|-6<x<3}                                                            D.{x|-6<x<2}

2.在复平面内，(3-2i)(1+i)    对应的点位于

A. 第一象限         B. 第二象限          C. 第三象限         D. 第四象限

3.曲线 y=x?+x2      在点(1,2)处的切线的斜率为

A.2                                    B.3                                   C.6                                    D.7

4.已知向量a,b 满足 |a|=3,a·b=-5,   则(a-2b) ·a=

A.-1                                  B.2                                    C.15                                  D.19

5.若某圆锥的母线与底面所成的角为45°,且其母线长为4,则该圆锥的体积为

B.

口

6.若数列(a,)的满足a?=6.;            ,则aan=

C.6

7.已知a ∈(0,受),3sin 2a=cos 2a+1,则 sin a=

A                         C.

8.已知函数f(x)=1n|x|+|ln     x2|,若函数g(x)=f     (x)-m   有4个零点，且其4个零点xi,

x?,x?,x?(x?<x?<x?<x?)               成等差数列，则m=

A ln 3                  B.2ln   3                          C. n3             D.3In   3