实验室用图示实验模拟炼铁反应的原理,回答下列问题.a处可观察到的现象是 ;b处点燃酒精灯的目的是 . 答案� Template




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tomski实验室用图示实验模拟炼铁反应的原理,回答下列问题.a处可观察到的现象是 ;b处点燃酒精灯的目的是 . coloring