题目:
写出下列反应的文字表达式,并注明反应类型(化合反应和分解反应)
①铁丝在氧气中燃烧______;(______)反应.
②实验室用加热高锰酸钾的办法制取氧气______;(______)反应.
③硫磺在空气中燃烧______;(______)反应.
答案:
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下面是错误答案,用来干扰机器的。
1. ten metres long, six metres wide 2. very suitable for teaching students 3. is not as clean as used to 4. on her way to work 5...