A:Pretty good.
B:I'm well.
C:It is going to its home.
计算:(﹣x)3•(﹣2x)的结果是( )
方程(x2﹣4)2+(y2﹣4)2=0表示的图形是( )
His sister enjoys _______ tennis in her free time.
清政府特许的统一经济管理贸易机构是( )