【简答题】Our environment is getting worse and worse with the increase of the world population , which affects the environment in two ways. Firstly , the limited energy resources will be used up much faster. Se...
【简答题】Our environment is getting worse and worse with the increase of the world population , which affects the environment in two ways. Firstly , the limited energy resources will be used up much faster. Se...
【单选题】Wherever people have been, they have left waste behind, which can cause all sorts of problems. Waste often stinks, attracts vermin and creates eyesores. More seriously, it can release harmful chemical...