下列措施中与秦朝速亡没有直接关系的是（　　）

作者的《草木篇》原作是通过对____、藤、仙人掌、____、毒菌五种植物的描绘，歌颂了生活中的____，鞭挞了____，表达了作者的“善恶之心，坦诚态度和刚直人格”。

阅读短文，下列问题。

      Helen Keller lived in the US. She was a great woman. When Helen was a baby, she often got ill. After a few years, she heard nothing, she saw nothing, and she couldn’t speak to other people.

     When one day, a teacher came to live with Helen and her family. The teacher helped Helen learn about words. Helen was a bright child and soon she learned to spell her first word. When she was older, she went to college（大学）.

     Helen was very famous. She helped many blind and deaf people. She went around the world and helped many people.

Helen was a very old woman when she died. Today, the world remembers her. She was blind and deaf, but she found a way to see and to hear.

向下图试管里的水中加入下述某种物质后，原来U型管内在同一水平上的红墨水，右边液面降低了些，左边液面上升了些，则加入的物质是      （    ）