問題詳情
4. 
( 2i＋3j )＝________。
( 2i＋3j )＝________。
參考答案
答案：D
難度：簡單0.857303
統計：A(80),B(34),C(13),D(763),E(0) #
個人：尚未作答書單：功績制度之目標
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