来自姜岩松的问题
【英语翻译Acertaincommunicationsystemismadeupof40symbols.Amaximumoftwosymbolsplacedtogether,ordernotmattering,makeupaword.Whatisthemaximumnumberofwordsinthiscommunicationsystem?】
英语翻译
Acertaincommunicationsystemismadeupof40symbols.Amaximumoftwosymbolsplacedtogether,ordernotmattering,makeupaword.Whatisthemaximumnumberofwordsinthiscommunicationsystem?

