搜索 - 科创

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先晒到这...这些是至少半年前拍的...最近又更新了不少,有时间拍了再晒...晚些开新贴晒设备,一半是DIY的,一半是二手市场淘的...

哎，悲剧啊，总是看到自己有那么多工具，就感觉真好啊。连机械的都有不少了，可是看楼主这架势，两个字，，，，，无语。估计只要他想做什么，就可以做什么了。LZ搞这些东西多久啦？？

三、中学化学实验中的先与后21例 1.加热试管时，应先均匀加热后局部加热。 2.用排水法收集气体时，先拿出导管后撤酒精灯。 3.制取气体时，先检验气密性后装药品。

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