30.为了研究植物的�吸作用小刚设计了如图所示的装置请你和小刚一起探究下列问题 1实验时广口瓶用不透光的�纸包住其目的是为了防止 Template




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tomski30.为了研究植物的�吸作用小刚设计了如图所示的装置请你和小刚一起探究下列问题 1实验时广口瓶用不透光的�纸包住其目的是为了防止 coloring