13. 有一電路如【圖3】所示,當A、B、C、D四個輸入都為“1”狀態時,其輸出狀態為何?
(A) X = 1,Y= 0 (B) X = 0,Y= 1 (C) X = 0,Y= 0 (D) X = 1,Y= 1(E)一律給分