如图是甲、乙两个物体的频闪照片,从图可知,甲物体做____运动,乙物体做____运动.
如果一个物体能反射所有色光,则该物体呈现____ 色;如果一个物体能吸收所有色光,则该物体呈现____ 色。
复数1-i2的值是( )
There are fewer and fewer tigers in India. The situation will continue ______ humans stop hunting them for their fur and bones.