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【简答题】
同学在学习《金属材料》单元后做了如下实验：把长时间放置在空气中的铝片放在酒精灯火焰（酒精灯火焰平均温度一般在600-700℃左右）上加热（如图1），认真观察铝片的变化．加热几分钟后铝片表面开始鼓起许多小泡（如图2）；继续加热，小泡聚集成较大的泡，在一层膜内向下移动（如图3、图4）；持续加热，膜内熔化的液体渐渐汇集流入下面的包裹膜内，好象水盛放在塑料袋中（如图5、图6）． （1）通过以上现象的观察和分析，同学可能推测出铝的什么物理性质或化学性质？ （2）铝是非常活泼的金属之一，但因为具有良好的抗腐蚀性能，所以在工农业生产、国防建设和生活中广泛应用．的实验对解释“铝的良好抗腐蚀性”有启发吗？请你解释．
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has been completed
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D.
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