①预见和指明社会发展的方向，指引人们追求美好的未来

②直接作用于社会制度，引起社会形态的变化

③动员和掌握广大人民群众，从而转化为巨大的物质力量

④提出社会发展的理想目标，提供社会变革的政治保证

选择正确答案

     A dog is walking along a road. It is a big dog. It is carrying a piece of meat. The piece of meat is in the dog's mouth. The dog is walking across a bridge now.There is water under the bridge. The water is very deep. The dog is looking into the water. It can see a dog in the water. This dog has a piece of meat in its mouth, too. The big dog is barking at the dog in the water. It wants its piece of meat, too. The big dog's piece of meat is falling into the water.