L2c 易惠芷 11

8. B

9. C

10. A

11. A  本题可以在F段的第三句话找到答案 In the cracking unit, large hydrocarbon chains are broken into smaller ones.

12. C

13.  B 这一题可以在F段的最后一句话中找到

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。在阅读的过程中有很多生词都需要有词典的查询来作为辅助参考才能读下去，有很多关于炼油的生词是不会的，还需要去不断的学习和积累词汇来为以后的阅读流畅打下基础。

This article describes the process of refining oil and describes its value and importance. In the process of reading, a lot of new words need to be looked up in the dictionary as a supplementary reference to read on, and a lot of new words related to oil refining are not, but also need to continue to learn and accumulate vocabulary to lay a foundation for future reading fluency.