;urately;;;、.[化]-transisomerism顺反异构stereoisomerism立体异构(现象);去污剂surfactant表面活化剂;能减低表面张力的物质或溶液(如清洁剂);-activeagent==Bywayof:经过:;。二、TextExplanationQustions:-: hemicalswith : [poundswhichistheoreticallypossible].,[oftheremainder].=beadj.
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