在同学家做客,你想吃桔子时,可以说:( )
A:Can I have some oranges, please?
B:Can I have some apples, please?
C:Can I have some grapes, please?
如图所示,两个啮合的齿轮,其中小齿轮半径为10cm,大齿轮半径为20cm,大齿轮中C点离圆心O2的距离为10cm,A、B两点分别为两个齿轮边缘上的点,则A、B、C三点的( )