常用作辅助乳化剂的是() A.硅酮类 B.液体石蜡 C.羊毛脂 D.花生油 E.单硬 发布时间:2020-06-17 23:53 │ 来源:www.tikuol.com 题型:单项选择题 B型题 问题: 常用作辅助乳化剂的是()A.硅酮类B.液体石蜡C.羊毛脂D.花生油E.单硬脂酸甘油酯
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题型:单项选择题 B型题 大气环境质量现状监测项目是指( )。A.《环境空气质量标准》中的指定项目B.建设项目所排放的各种主要大气污染物C.将筛选出的污染因子作为监测因子D.根据地方有关标准进行确定 查看答案