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A: Mum, I have finished my homework .____ .B: Of course .Which is your favorite TV program ?A: Sports .It is said there will be a wonderful football match on TV tonight .B: ____ A: A Chinese team will play against a Japanese team .B: ____ A: I'm not sure . Ball games are usually shown on Channel 8.B: ____ A:Well , it must be on Channel 6 then . Try that .B: Here it is .____ Let's watch it together .A: That's all right.
某学习小组准备探究气体的测定和数据处理方法。
【提出问题】利用碳酸钙与稀盐酸反应来测定生成CO2的量。
【实验设计】通过下列两个实验分别测定CO2的质量和体积。
实验一 实验二