题目

Each year, 500 million people from 164 countries celebrate World Environment Day on 5 June． It may seem like there is not much that an individual can do to save the world, but there is． One of the first steps is to understand the problems and their solutions． Try to learn about your ecosystem, endangered animals and pollution． If you are well-informed, you can make better decisions about how to save energy and produce less waste． You can also learn how to be a better consumer and not buy products made from endangered animals or which have too much packaging, Also share your co如图所示中，已知反射光线OB，画出入射光线AO并标出反射角及大小。