若正比例函数y=kx(k≠0)的图象经过点(1,﹣2),则其表达式为( )
四边形ABCD中,对角线AC与BD交于点O,下列条件不能判定这个四边形是平行四边形的是( )
—I seldom agree with my manager's words.
—In order to succeed here, you should overcome your ________ against your manager( )
有关西北地区的自然资源的说法错误的是( )