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【简答题】
（7分）人类每年都要从大自然中提取大量的金属，用于满足日常生活和工农业生产的需要。 （1）下列金属制品中，主要利用金属导热性的是（填字母序号）。 （2）钢铁是我们日常生活中使用最多的金属材料。高炉炼铁常以焦炭、铁矿石、石灰石、空气等为原料。炼铁过程中，一氧化碳和赤铁矿（主要成分为Fe 2 O 3 ）反应的化学方程式为 。 （3）我国钢铁年产量很高，但因锈蚀造成的损失也很惊人。人们常采取在铁制品表面涂刷油漆等方法，以防止其锈蚀。上述方法所依据的原理是 。 （4）某兴趣小组的同学从实验室收集到含有H 2 SO 4 、FeSO 4 、CuSO 4 的废液，他们想从中回收和一些盐，设计了如下实验方案（部分产物未列出）。请结合实验方案回答： 操作①中发生反应的化学方程式为 、 A~F六种物质中含铁元素的有 （填字母代号）。
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alike
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equivalent
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sensible
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sensitive
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A.
a good knowledge of physics is needed
B.
one needs to have a good knowledge of physics
C.
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