这篇文章的单词很多都很陌生，只是了解文章的大概内容。这篇文章讲述的是关于炼油的过程，描述了炼油的价值和重要性。我对这篇文章的阅读理解对我来说有点困难。我需要辅助一些翻译软件，才能理解这篇文章的内容。所以我需要去积累一些专业方面的词汇，才能更好的去理解文章。
This article is mainly about the process of refining oil, and the value and importance of refining oil. It describes the process of separating different parts to make different products. Broke my understanding of oil refining. I need some translation software to understand this article. There are so many professional words in the article that it is difficult for me to understand the meaning of the article.
unit16 ：Matching
8.B 9.C 10.A 11.A 12.C 13.B
讲解：8题答案在F段的 This is a chemical process in which smaller hydrocarbons are unified, or combined, to make larger ones. 12题的答案在 F段的最后一句
