Therearefourpossiblebirthorderpositionswithinafamily.Ac...
问题详情：Therearefourpossiblebirthorderpositionswithinafamily.Achildmaybetheoldest,theyoungestorthe 41 child,oranonlychild 42 nobrothersorsisters.Birthordertheorysaysthatourbirthorderinfluences...