题目

Next autumn when you see wild geese heading south for the winter flying in a V formation, you might think about what scientists have discovered as to why they fly that way. As each bird flaps its wings, it creates uplift(提升) for the bird immediately following. By flying in a V formation the whole group adds at least 71% greater flying range than if each bird flies on its own. People who share a common direction and sense of community can get where they are going more quickly and easily because they are traveling on the push of one another. When a wild goose falls out of the format将两图结合分析，可以看出（　　） A、吹东北季风时降水多B、吹西南季风时降水多C、水热丰富无洪涝灾害D、地形对降水没有影响