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根据以下铁的实际用途说明铁具有的性质． （1）家用铁制的锅铲上部常加一木柄或塑料柄，这说明铁具有______性． （2）盛放石油产品（如汽油、柴油等）的油罐车振荡可以产生静电，容易引起火灾、所以在油罐车尾部有一条拖地铁链．这是利用铁的______性． （3）脸盆、痰盂制品的表面烧一层搪瓷的目的除了美观外，主要是______ （4）钛和钛合金可以用来造轮船外壳，这是因为______．
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举一反三
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