题目：有1、2、3、4个数字，能组成多少个互不相同且无重复数字的三位数？都是多少？题目：企业发放的奖金根据利润提成。-Topic: 1, 2, 3, 4 Numbers, how many can form a different from each other and have no the repeat number three digits? How much be? Topic: enterprise extending bonus profits according to the co