I will choose the thirty percent children, you know, the children are the hope of the future,if we can't finish things，we can give them to finish. For these children, I would choose to under ten years of age, because from birth to ten years old is the best time of brain development, if there is a good guide they will become very clever. Then I will choose 15 women, of course, they have to take care of the children, cooking and washing, and a very important reason, they and the men can produce generations of children to continue life. I chose 20 young people and 5 middle-aged people,young people can go to do some exploration and discovery, make some contribution， earn the money and so on. 5 middle-aged people can teach children knowledge, of course,they must be the teacher. The last 5 officials to make some important decisions ,they must be decisive and have leadership, then the 15 sailors to protect our lives, 10 scientists to do research.