现代城市里汽车猛增,道路拥挤,在里弄小巷经常出现车辆开“碰头会”的现象。在进退两难时,你发现了像上图所示的机会。请你指挥,怎样让两边的汽车安全而又顺利地通过?[大胆设想]是否可以借助其他物品作为实验材料,帮助解难?[材料]画一幅上图,取两种颜色的替代物各3个,分别代表 In modern cities, the number of vehicles surged and the roads were crowded. Vehicles often found themselves in “alleyways” in alleyways. In the dilemma, you found the opportunity shown in the figure above. Please direct, how to make both sides of the car safely and smoothly through? [Bold idea] whether other materials can be used as experimental materials to help solve problems [material] draw a picture, take two color alternatives 3 A, respectively, on behalf of