2,2,7,18,31,90,(),括号里应该填?a.57 b.69 c.86 d.79
问题描述：
2,2,7,18,31,90,(),括号里应该填?
a.57 b.69 c.86 d.79
答
2,2,7,18,31,90,(),括号里应该填?
a.57 b.69 c.86 d.79