10. 若 ( a - 1 ): 7 = 4 : 5，則 10 a + 8 之值為何？(A) 54(B) 66(C) 74(D) 80

問題詳情

10. 若 ( a - 1 ): 7 = 4 : 5，則 10 a + 8 之值為何？
(A) 54
(B) 66
(C) 74
(D) 80

參考答案

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