問題詳情
47.滲氮法爲表面硬化法，其採用鋼料的主要合金元素爲哪些？
(A) Al. Cr. Mo
(B) Cr、W、V
(C) Si、Mn、Ni
(D)Ni、Cr、W
(A) Al. Cr. Mo
(B) Cr、W、V
(C) Si、Mn、Ni
(D)Ni、Cr、W
參考答案
答案：A
難度：適中0.529954
統計：A(345),B(89),C(117),D(100),E(0)
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