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例(1)有一条行车道宽10米,在这条行车道的正中央行驶着一列(很多)汽车,汽车行驶的速度都是54千米/小时.若每辆车的长度都是4米,宽度都是2米,相邻两辆汽车的车距(前一辆车的车尾与后一辆车的车头之
Example (1) has a lane width of 10 meters. In the center of the carriageway is a row of (many) cars. The speed of the cars is 54 kilometers per hour. If each car is 4 meters in length , width is 2 meters, the distance between two adjacent cars (the front of a car and the rear of the car