- 搜標(biāo)題
- 搜題干
- 搜選項(xiàng)
單項(xiàng)選擇題
低碳鋼中碳的質(zhì)量分?jǐn)?shù)小于（）
A.0.25%
B.0.6%
C.0.8%
D.2.11%
A.0.25%
B.0.6%
C.0.8%
D.2.11%
