【简答题】(10分)亚甲基蓝(Methylnene Blue)在碱性条件下与葡萄糖作用生成亚甲基白(Methylene White)。亚甲基蓝的结构简式如下: 著名的蓝瓶子实验操作步骤如下: ①如图示在250mL锥形瓶中,依次加入2 g NaOH、100 mL H 2 O和3 g葡萄糖,搅拌溶解后,再加入3滴~5滴0.2%的亚甲基蓝溶液,振荡混合液呈现蓝色; ②塞紧橡皮塞(活塞a、b关闭),将溶液静置,溶液...
【单选题】There are several ways you can find out about the countries
and places you wish to visit. You can talk to friends who have travelled to the
places. Or you can go and see a colour film. Or you can re...
【简答题】Do you enjoy visiting a museum? Did you ever make a plan before a visit? Every museum must have something that attracts you. And there are many possible ways to enjoy yourself in a museum. If you foll...