組合數據類型練習，英文詞頻統計實例上

字典實例：建立學生學號成績字典，做增刪改查遍歷操作。 ids=['01','11','21'] scores=[85,90,65] dic={} dic['01']=scores[1] dic['11']=scores[0] dic['21']=scores[2] print(dic) print(dic.keys()) print(dic.values()) print(dic.items(

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