【简答题】阅读理解。 There are all kinds of trains in the world. There are trains to carry people, trains to carry animals or carry things. There are fast trains and slow ones. Some trains go through hills. In big c...
【简答题】What is the main idea of the passage? A) It is unwise to place the results of scientific research in the hands of a powerful mad man. B) The more knowledge one has, the wiser one becomes. C) Any incre...