中国大学MOOC: 文献:Clay-chitosan nanobrick walls: Renewable thin films with exceptional gas barrier.By Kirkland, Christopher;244th ACS National Meeting & Exposition, Philadelphia, PA, United States, August 19-23, 2012 (2012)以下说法正确的是：
举一反三
- 文献:Clay-chitosan nanobrick walls
- 中国大学MOOC: 根据题录判断文献类型：Development of green food products in Thailand.By Chaiwanichsiri, Saiwarun.From Abstracts of Papers, 248th ACS National Meeting & Exposition, San Francisco, CA, United States, August 10-14, 2014 (2014), IAC-36. Language: English
- 文献：Synergisticantimicrobialagents.ByStockel,RichardF;Sawyer,AnthonyJ.U.S.Pat.Appl.Publ.(2012),US20120225942A120120906。以下说法正确的是：
- The national flag of the United States is .
- According to the statistics in 2012, the United States is the _______ most populous nation in the world. A: first B: second C: third D: forth