题目内容：
下列有关纯铁的描述正确的是（ ）
A熔点比生铁的低
B与相同浓度的盐酸反应生成氢气的速率比生铁的快
C在潮湿空气中比生铁容易被腐蚀
D在冷的浓硫酸中可钝化
答案解析：
单选题：下列有关纯铁的描述正确的是（ ） A熔点比生铁的低B与相同浓度的盐酸反应生成氢气的速率比生铁的快C在潮湿空气中比生铁容易被腐蚀D在冷的浓硫酸中可钝化
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