某班同学在实验室制取二氧化碳老师观察到了四个同学的如下操作其中正确的是 A连接仪器b检查气密性c取用石灰石d验满 题目和参考 Template




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tomski某班同学在实验室制取二氧化碳老师观察到了四个同学的如下操作其中正确的是 a连接仪器b检查气密性c取用石灰石d验满 题目和参考 coloring