在编题教学中,常有师生编出含“每小时……的速度”、每分钟……的速度“等词句的题目.例如一位教师在课堂上就编出了下面一道题目:”小明骑自行车每小时可走12公里,是他每小时步行速度的2倍.小明每小时的步行速度是多少公里?“从表面上看,这道题目没有什么问题,但若仔细推敲,便不难发现题中”每小时步行速度“的说法是不妥当的.因为”速度“指的是单位时间 In the process of teaching, teachers and students often include the title of ”speed per hour ... speed per minute ...“ etc. For example, a teacher in the classroom compiled the following Title: ”Xiaoming riding bicycle 12 kilometers per hour, is his walking speed twice per hour.“ Xiao Ming per hour walking speed is how many kilometers? ”On the surface, this issue is no problem, but if Careful scrutiny, it is not difficult to find the title “speed per hour walk ” is not appropriate because “speed ” refers to the unit of time