問題詳情
33.—般灰鑄鐵中內含什麼物質，可以促進切削時之潤滑效果？
(A)石墨
(B)鋁
(C)矽
(D)硫
(A)石墨
(B)鋁
(C)矽
(D)硫
參考答案
答案：A
難度：簡單0.852897
統計：A(574),B(13),C(45),D(41),E(0)
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