在实际生活中,常见到一些不同的路径比较长度的问题,解决问题的关键是从实际问题中建立数学模型,转化为计算弧的长的问题。请看几例:例1.如图1是公园的路线图,☉O1,☉O2,O0两两相切,点A,B,O分别是切点,甲乙二人骑自行车,同时从点A出发,以相同的速度,甲按照“圆”形线行驶,乙行驶“8字型”线路行驶.若不考虑其他因素,结果先回到出发点的人是() In real life, the problem of comparing the lengths of some different paths is common. The key to solving problems is to establish mathematical models from practical problems and turn them into long problems of calculating arcs. Please see a few examples: Example 1. As shown in Figure 1 is the road map of the park, ☉O1, ☉O2, and O0 are tangent to each other, points A, B, and O are tangent points, respectively. Departure, at the same speed, A follows the “circle” shape line, B travels on the “8-character line”. If you do not consider other factors, the result is the person who first returns to the starting point ()