_____ a red evening dress, Jane managed to attract everyone's attention at the party. [ ]

A. Having on

B. Put on

C. Wearing in

D. Dressed in

用齿条形刀具范成法加工渐开线齿轮时，为了使标准齿轮不发生根切，刀具的齿顶线（圆）应低于极限啮合点N1。其最少齿数为（）。