As compared to carbon dioxide，dry chemical has which advantage?（）
- ACleaner
- BEffective on metal fires
- CGreater range
- DMore cooling effect
问题
As compared to carbon dioxide，dry chem
参考解析：
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Carbon dioxide的中文含义是（）。A碳氢化合物B碳氧化合物C一氧化碳D二氧化碳