1.
C1烟煤燃烧后底灰中的纤维状微米级二氧化硅颗粒物（A）和球形纳米二氧化硅颗粒物（B），能谱分析发现赋存有钙、铁等元素（C）
The fibrous silica micronparticles (A) and spheral silica nanoparticles (B) in C1 coal ash, and containing traces of iron and calcium(C)
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