On Christmas Eve, (young children are often torn between the desire to go to bed early so that Santa Claus will bring their presents quickly and the desire to stay up late in case they miss any of the fun).
【简答题】(2分)茶是我国的特产,种类很多。其中,绿茶是将新鲜的茶叶炒熬,破坏其中酵素,再经搓揉、烘焙而成。茶叶的化学成分主要是茶碱(C 8 H 10 N 4 O 2 ·H 2 O),还有鞣酸及芳香油等。 阅读以上信息后回答: ①茶碱(C 8 H 10 N 4 O 2 ·H 2 O)分子中______原子的个数最多; ②茶碱(C 8 H 10 N 4 O 2 ·H 2 O)中________元素的质量分数最...