【简答题】Watch the two provided videos (154.5mb in total) of Sun Yang's public hearing carefully and think about the following two questions: What happened in the two videos? Where do you think the interpreter...
【简答题】A、B两种有机物,分子式都是C 9 H 11 O 2 N。 (1)化合物A是天然蛋白质的水解产物,光谱测定显示,分子结构中不存在-CH 3 ,化合物A的结构简式为__________________。 (2)化合物B是A的同分异构体,且可用某种分子式为C 9 H 12 的芳香烃在一定条件下制备得到,且只有一种结构。化合物B的结构简式为________________。