下列有关实验现象的描述正确的是a硫磺在氧气中燃烧�出明亮的蓝紫色火焰生成二氧化硫b蜡烛在氧气中燃烧时生成水和二氧化碳c镁条在空气中 Template




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tomski下列有关实验现象的描述正确的是a硫磺在氧气中燃烧�出明亮的蓝紫色火焰生成二氧化硫b蜡烛在氧气中燃烧时生成水和二氧化碳c镁条在空气中 coloring