如图为一皮带传动装置，大轮与小轮固定在同一根轴上，小轮与另一中等大小的轮子间用皮带相连，它们的半径之比是R_A∶R_B∶R_C=1∶2∶3，A、B、C分别为轮子边缘上的三点，那么三点线速度之比v_A∶v_B∶v_C =             ，角速度之比ω_A∶ω_B∶ω_C=          。

Both of them refused to say sorry and neither was willing to talk to      .

A．others

B．the other

C．other

D．one another