3、owthepictureofLiuXianginthe2004Olympics.Hebroketheworldrecordof100-metrehurdlerace.LetthestudentstalkabouttheracetheperfectperformanceofLiuXiang.Step2.Cometo“THINKABOUTIT”.Dividetheclassintogroupsofthreeorfour.Discussthefollowingquestions:1. Doyouknowofanyworldrecords?Whatarethey?2. Who