【单选题】Environment and Health Issues We are living in a hostile world: depletion of ozone (臭氧) layer, global warming, air pollution, worldwide transmission of AIDS.... The fact that these environmental and h...
【简答题】World Wildlife Fund (WWF)'s goal is to save the world's environment. The organization was set up ___21__September 11,1961. In the beginning, WWF worked __22__ the world's wildlife. Now, it works to sa...