根据下列短文内容，在短文后的空格处填上一个恰当的词，使短文完整、通顺。
Dear Bob,
   My name is Rich .I'm fourteen ____  old. I'm studying in a middle school. My school is nice and clean. There are 30 students in my class. It's ____  today. My classmates and I are ____  a good time on the beach. It’s a nice place .The water is blue and clear. Many birds ____  flying over the sea. Many people are ____  in the sea. Some boys are ____   football. Some people are lying____  the beach. A girl is ____  a book on a chair .Another girl is ____  photos. I ____  writing to you! What are you doing?
   I hope you can write to me soon.
   Best wishes!
                                                                                                                                                                                  Rich

下表列出了KNO₃在不同温度下的溶解度．

痰是气管分泌的黏液和黏液粘住的灰尘、细菌等。

从《见字如面》、《中国诗词大会》到眼下正热的《朗读者》，一波接一波的热潮掀起背后，中华文化穿越历史与现实，扣响了越来越多人的心门，“文化自信”也越来越成为一种共识。请写出与下列信息相对应的文化成就。