- 搜標題
- 搜題干
- 搜選項
單項選擇題
Gr15鋼中含碳量為（）%。
A.0.55~0.95
B.0.75~1.05
C.0.95~1.05
D.0.95~1.15
A.0.55~0.95
B.0.75~1.05
C.0.95~1.05
D.0.95~1.15
