根据下列现象说明空气中存在着某种物质请将物质的名称或符号写在空格内.1小白鼠在装有空气的密闭容器内可存活一段时间说明空气内存在着o2 Template




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tomski根据下列现象说明空气中存在着某种物质请将物质的名称或符号写在空格内.1小白鼠在装有空气的密闭容器内可存活一段时间说明空气内存在着o2 coloring