問題詳情
21. 將金屬加熱至適當溫度再緩慢冷卻，可使化學成分分布均勻為
(A)退火
(B)回火
(C)淬火
(D)冷作。
(A)退火
(B)回火
(C)淬火
(D)冷作。
參考答案
答案：A
難度：非常簡單0.944444
統計：A(17),B(0),C(0),D(1),E(0)
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