“东方红，太阳升…他为人民谋幸福，他是人民的大救星．”这首歌里的“人民的大救星”是指在第一届中国人民政治协商会议上，被选举为中央人民政府主席的（　　）

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.

有关发达国家与发展中国家的叙述，正确的是（　　）

人体血浆中不可能出现的是