题目

如图所示，两轮用皮带传动，没有打滑，A、B、C三点位置如图示，r1＞r2，rC=r2，则关于这三点的线速度υ、角速度ω和向心加速度a的关系正确的是（                                  ）                                                                                                                                                    A．  ωC＞ωA＞ωB      B． vA=vB＞vC       C． aC＞aA＞aB    D． aC=aB＞aA                                                                                                                                        答案：B

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