問題詳情
23.在CNS國家標準中自來水用硬質聚氯乙烯塑膠管之標稱管徑，下列何者無該標稱管徑？
(A)25
(B)30
(C)35
(D)40
(A)25
(B)30
(C)35
(D)40
參考答案
答案：C
難度：簡單0.722628
統計：A(7),B(24),C(99),D(7),E(0)
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