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Gaokao Chemistry Practice Question

“灌钢法”是我国古代劳动人民对钢铁冶炼技术的重大贡献, 陶弘景在其《本草经集注》中提到“钢铁是 杂炼生鍒作刀镰者”。“灌钢法”主要是将生铁和熟铁(含碳量约 $0.1 \%)$ 混合加热, 生铁熔化灌入熟铁, 再锻打 成钢。下列说法错误的是

  1. A.钢是以铁为主的含碳合金
  2. B.钢的含碳量越高, 硬度和脆性越大
  3. C.生铁由于含碳量高, 熔点比熟铁高
  4. D.冶炼铁的原料之一赤铁矿的主要成分为 $\mathrm{Fe}_{2} \mathrm{O}_{3}$

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