ÌâÄ¿ÄÚÈÝ
²¨Ô´SÔÚt£½0ʱ¿Ì´ÓƽºâλÖÿªÊ¼ÏòÉÏÔ˶¯£¬ÐγÉÏò×óÓÒÁ½²à´«²¥µÄ¼òгºá²¨£®S¡¢a¡¢b¡¢c¡¢d¡¢eºÍa¡ä¡¢b¡ä¡¢c¡äÊÇÑز¨´«²¥·½ÏòÉϵļä¾àΪ1mµÄ9¸öÖʵ㣬t£½0ʱ¿Ì¾ù¾²Ö¹ÓÚƽºâλÖã¬ÈçͼËùʾ£®µ± t£½0.1s ʱÖʵãS µÚÒ»´Îµ½´ï×î¸ßµã£¬µ± t£½0.4s ʱÖʵãd¿ªÊ¼ÆðÕñ£¬Ôò £º
A£®µ± t£½0.4s ʱ£¬ÖʵãcµÄ¼ÓËÙ¶È×î´ó
B£®µ± t£½0.4s ʱ£¬ÖʵãaµÄËÙ¶È×î´ó
C£®µ± t£½0.4s ʱ£¬Öʵãb¡äµÄËÙ¶È×î´ó
D£®¸Ã²¨1sÄÚ´«²¥10m
ACD
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿