分解因式:x2﹣4=____.
Jane got up late this morning,so she had to take a ____ to school.
下列哪项不属于邓小平“南方谈话”的历史意义(作用)( )
设圆x+12+y2=25的圆心为C,A(1,0)是圆内一定点,Q为圆周上任一点.线段AQ的垂直平分线与CQ的连线交于点M,则M的轨迹方程为( ).