h�Bc�ֻ�ͼƬ
...¿½å•Šé”›ï¿½ç‘•ï¿½é”²æƒ§ï¿½ï¿½æ¾¶ï¿½çš„ãÓ
±àÂëÓÐÎÊѽ¡£»»³ÉGBK°É.
...Ô˶¯»áµ±ÌìС￵İ༶´ó°ÍÒÔ40km/hµÄƽ¾ùËÙ¶ÈÐÐÊ»...
(1)¸Ã±êÖ¾ÅƵĺ¬Òå:ͨ¹ý¸Ã¹«Â·´óÇųµËÙ²»ÔÊÐí³¬¹ý70km/h;(2)ÒÑÖªÆû³µµÄËÙ¶Èv=40km/h,t=0.5h,Ôò´Ó47Öе½½±±Ê¦´óÌåÓý³¡µÄ...