halogens的知识精选

“halogens”可以造什么句,halogens造句
StudyonLow-halogensFlame-retardantPVC/PNBRThermoplasticElastomer;oneofvariouscompoundsofcarbonandanyofthehalogens.AllthehalogensrequireonemoreelectrontocompleteaP-shell.Acompound,suchasafluorocarbon,t...
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