题目

阅读理解      Think rock, paper, scissors is a children’s game? Think again.      Top players from around the world came together in Toronto to compete for a ten thousand Canadian dollar prize and the title of world champion.      More than 500 players, including national champions from Australia, Norway and New Zealand, attended.      The simple game is often used to make decisions and solve some simple problems.      Players hold their fists closed and count to three before making a fist (rock), a flat hand (paper) or two fingers (scissors). Paper covers roc17、为了解一组数据在各个小范围内所占比例的大小，将这组数据分组，落在各小组里数据个数与该数据组总数的比值是（　　）A、频率B、频数C、组数D、组距