480÷80=6,480扩大10倍,80缩小10倍,商是( )
A:扩大100倍
B:缩小100倍
C:不变
—I think it was not good.It was a(n) performance.
如图,一条小溪中有一个小球随着溪流漂流而下,则此小球所受浮力的方向应是( )