数字为:1,2,3,4,5,6,7,8,9,10 十个数字排列的例子为:1,2,3,4,5,6,7,8,9,10 1,3,2,4,5,6,7,8,9,10 1,4,2,3,5,6,7,8,9,10 ... ...可以有多少种排法?请详细说明