Science and technology are part of productive forces.The modern society has proved it.As we all see now,scientific achievements have changed the whole world and made people break away from ignorance and backwardness.The society has made great progress.This unit is arranged around the central topic—scientific achievement.In Warming up,there are several pictures asking students to talk about the most significant scientific achievements.The Speaking part introduces four different scientists who want to get money to complete their projects which are very helpful to human beings.
