【简答题】Years ago, many zoos kept all kinds of animals in small cages(笼子). Small cages made it easy for people to see the animals, but a small cage is not a good place for an animal to live in. Today zoos kee...
【简答题】阅读理解。 Zoology (动物学) deals with the study of the animals' habitat and behavior. It has nothing to do with people, so many students are wondering why they have to learn it. Our nature includes not just ...