课题 2 、化学是一门以实验为基础的科学

Sep 22, 2014

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课题 2 、化学是一门以实验为基础的科学. 一、对蜡烛及其燃烧的探究. 蜡烛燃烧的产物是二氧化碳和水。. 塑料管想该集气瓶中吹气 , 直至水被排空 , 再盖好玻璃片 , 将集气瓶从水中拿出来 , 另收集两瓶空气. 二、对人体吸入的空气和呼出的气体的探究. 呼出的气体中二氧化碳和水蒸气的量比空气的多，氧气的量比空气的少。.

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课题 2 、化学是一门以实验为基础的科学

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课题2、化学是一门以实验为基础的科学 一、对蜡烛及其燃烧的探究蜡烛燃烧的产物是二氧化碳和水。
塑料管想该集气瓶中吹气,直至水被排空,再盖好玻璃片,将集气瓶从水中拿出来,另收集两瓶空气.塑料管想该集气瓶中吹气,直至水被排空,再盖好玻璃片,将集气瓶从水中拿出来,另收集两瓶空气. 二、对人体吸入的空气和呼出的气体的探究呼出的气体中二氧化碳和水蒸气的量比空气的多，氧气的量比空气的少。