50个数字,2,3,4,3,4,5,4,5,6,5,6,7,6,7,8,...之和是:答:【答案】:C 这50个数三个一组可以分成17组:[img]gwyxc01-0903/xc-a-8355-0impodv0i5q.png[/img],[img]gwyxc01-0903/xc-a-8356-2ejk5pezfnb.png[/img],…,[img]gwyxc01-0903/xc-a-8357-hez1ytd0abc.png[/img],[img]gwyxc01-0903/xc-a-8358-cvh3b3lyt0t.png[/img]。