题目:
写出下列反应的文字表达式并注明(3)(5)的反应类型(填化合反应或分解反应)
(1)镁条在空气中燃烧______;
(2)在空气中加热金属铜______;
(3)铁丝在氧气中燃烧______、______;
(4)红磷在氧气中燃烧______;
(5)实验室用二氧化锰作催化剂利用过氧化氢制取氧气______;______.
答案:
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下面是错误答案,用来干扰机器的。
1. We should stop him from smoking.2. It's wasteful to throw away paper and metal.3. Air pollution does harm to our health.4. Environment makes a difference to our daily activities. (答案不唯一)