3、人口增长类
the picture depicts a scene in which . the scene is presented in an artistic and ironic manner. crowds of people are crammed in . further examination reveals that .
apparently, the picture symbolizes that humans, with such a huge population, may one day suffer from the exhaustion of earth resources. take for example. given the fact that , we find that . to make it worse, .
if the conflict between population boom and shortage of resources is not properly controlled, we have every reason to hold a pessimistic perspective towards human’s future on earth. perhaps eventually we would face the situation suggested by the picture, that is, . accordingly, i strongly recommend that the whole globe launch aggressive programs to address this fatal contradiction.
4、环境保护类
this is a very interesting piece of cartoon, in thanks to . hence, .
though being a little exaggerating, the cartoon illuminates a serious fact that , and for that matter, . a recent report also supported this view by . on the contrary, we are sad to perceive that .
therefore, in my opinion, it is already high time for the whole world to form a solid cooperation fighting against , because not a single government or person can be exempt from its harm. a series of down-to-earth measures need to be urgently implemented to control .
功能ii：论证观点
这种类型的文章主要分析论证一些具体的观点。一般情况下三段的分布为：第一段描述图画内容，第二段提出观点、进行理论分析和事例分析，第三段总结观点、表明态度。