正数是{0.2,6,330,2又1/6,}
分数是{0.2,-3.14,-3分之4,-0.13循环,-5%,2又1/6,}
正整数是{6,330}
负整数是{-12}
正有理数是{0.2,6,330,2又1/6}
负有理数是{-3.14,-3分之4,-0.13循环,-5%,-12}
自然数是{6,330,0}