A、<img width="304" height="42" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/8a7a1029-50cb-47d6-b4e9-74beb5f93570.png" />
B、<img width="299" height="38" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/aa7809ce-4517-4be3-8868-fd25037fdd7a.png" />
C、<img width="302" height="41" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/9e2911d9-5425-4f35-acfb-d20bfc945986.png" />
D、<img width="287" height="41" src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/f5aac054-a9a6-421c-af61-4c9f38261181.png" />
查看答案
秒的速度、切向加速度与法向加速度分别为（ ）。