Expandingpopulationsandsteadilyimprovingcommunicationsb... 國語站 題庫 1.87W 大中小設定文字大小 問題詳情:Expanding populations and steadily improving communications brought more trade and contact, but also more _______ between social groups. A. cooperation B. friction C. liberation D. distribution【回答】B知識點:名詞題型:選擇題 TAG標籤:#