这是一篇传统革命题材的文章，课文最后在碑文“____、____。”中升华。

古人云：“竭泽而渔，非不得鱼，明年无鱼；焚林而畋，非不收兽，明年无兽”这句话所体现的哲学道理是（    ）

    This is Joy's bedroom.it's a small room . He has some pictures.They are on the wall. He also has a desk and a chair in his bedroom.The desk is near the window. His bag and pencil box are on the desk. There are some pencils,a pen,a ruler in the pencil box. He has a baseball and a basketball. They are under the bed.Joy likes playing basketball and baseball. He also has two volleyb alls,but he doesn’t like playing volleyball.
根据短文内容，从A、B、C、D四个选项中选出能填入空白处的最佳选项。

将硫酸钠和氯化钠的固体混合物35克放入烧杯中，加入161.6克水后，固体混合物完全溶解，取此溶液一半，加入75克氯化钡溶液恰好完全反应，生成沉淀23.3克．计算： 

我会填。

①悲：共____画，音序是____。

②污：共____笔，第三画是____。