一、Christopher Columbus 托福听力原文： FEMALE PROFESSOR: It's interesting how much we can learn about culture in the United States by looking at how Christopher Columbus has been portrayed throughout United ...

STEVE EMBER: Welcome to THE MAKING OF A NATION – American history in VOA Special English. I’m Steve Ember. Generations of schoolchildren have been taught that Christopher Columbus discovered the New ...

Today we take for granted that the world is round. In the fifteenth century, however, most people believed the world was flat. They thought that monsters or a trip over the edge of the earth waited ...