答：C零不算,连续自然数之和为30：1）两个自然数：n+n+1=30,2n=29,n不是整数,假设不成立2）三个自然数：n+n+1+n+2=30,3n=27,n=93）四个自然数：n+n+1+n+2+n+3=30,4n=24,n=64）五个自然数：n+n+1+n+2+n+3+n+4=30,5n=2...