题目

甲、乙两物体分别放在上海和北京，它们随地球一起转动时，下面说法正确是（ ）                     A．甲的线速度大，乙的角速度小                                                             B．甲的线速度大，乙的角速度大                                                             C．甲和乙的线速度相等                                           �