—How long have you ____________ your new bike?—For nearly two months.
A:buy
B:bought
C:have
D:had
下列事实不能用金属的活动性顺序加以解释的是( )
如图,△ABO的顶点坐标分别为A(1,4)、B(2,1)、O(0,0),如果将△ABO绕点O按逆时针方向旋转90°,得到△A′B′O′,那么点A′、B′的对应点的坐标是( )
Lucy is ____ ____ ____ Lily.