某校化学课外活动小组在一次活动中取刚降到地面的雨水水样每隔5分钟用ph计测定一次ph其数据如下表已知正常雨水的ph约为56原因是 Template




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tomski某校化学课外活动小组在一次活动中取刚降到地面的雨水水样每隔5分钟用ph计测定一次ph其数据如下表已知正常雨水的ph约为56原因是 coloring