2005年北京春考理科第19题是一道应用题,解法常规,似乎很平常,然而仔细咀嚼,仍有探究的余地．试题经过长期观测得到:在交通繁忙的时段内,某公路段汽车的车流量y(千辆／小时) 与汽车的平均速度v(千米／小时)之间的函数 In 2005, the 19th question of Beijing Kaochunkeke is an applied question. It seems to be normal to solve the problem. However, if you chewing it carefully, there is still room for exploration. After long-term observations, the test questions are: In the period of heavy traffic, the traffic between the vehicle traffic y (thousand vehicles/hour) and the average speed v (km/hour) of a car in a road section.