分层设色地形图上，绿色地区通常表示的地形类型是（  ）

阅读短文，从方框中选择适当的单词填空。

Some people in Britain and America like to invite friends to dinner at home. But this is more common in America ____ in Britain. Don't worry if your English friends don't invite you home. It doesn’t mean that ____ don't like you.
When you are invited to an evening dinner, ask your friends what ____ you should arrive. It is a good idea to take a small present when you arrive, and it is ____ to say how much you like the house, the room, or the pictures in the room. But don't ask how much these things cost. In this way, ____  you and your friends will have a pleasant get-together.

如图是人们常见的几种动物，请分析回答：

数轴上到原点的距离等于1的点所表示的数是（　　）