37. 軟鋼之含碳量為
(A)0.21~0.35%
(B)0.10~0.20%
(C)0.36~0.55%
(D)0.56~1.7%。

答案:登入後查看
統計: A(9), B(117), C(10), D(1), E(0) #2809792