大学英语四级开头句，结尾句，中间段句子 - 7(6)

? 分类法

例：

Nowadays the news media mainly consists of radio, television and newspapers. Each type has its own advantages and disadvantages.

Newspapers are the oldest form for communicating the news. Today many people still begin their day by reading the morning paper while having breakfast, and end their day by reading the evening paper while having dinner.

The invention of the radio has had a tremendous influence on the world. It is able to bring up-to-minute news to distant places in a matter of seconds. Thus the development of the radio has made the world a smaller place.

Television is the most recently developed device for communication. It allows us to see as well as to hear the news. The fact that it enables people to see visual images has had a considerable effect on our perceptions of world event.

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分析：文章对报纸、收音机和电视三类新闻媒介分开进行说明，指出了每种的特点，使读者一目了然。

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中间段常用的核心句型：