做化学实验必须注意安全下列属于安全操作的是a加热试管中液体时试管对着人b鼻孔�到容器口直接闻药品气�c实验中眼睛里溅进药液立即用 Template




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tomski做化学实验必须注意安全下列属于安全操作的是a加热试管中液体时试管对着人b鼻孔�到容器口直接闻药品气�c实验中眼睛里溅进药液立即用 coloring