It is shown that men have _____ as women do on average while driving according to recent statistics. [ ]

A. twice as many serious accidents

B. serious accidents as twice many

C. twice serious accidents as many

D. serious accidents as many twice

根据施工过程工时研究结果，与工人所担负的工作量大小无关的必须消耗时间是（）。

A.基本工作时间

B.辅助工作时间

C.准备与结束工作时间

D.多余工作时间