27. According to Paragraphs 2 and 3, scientific publishers Elsevier have _____

【答案】[A] thrived mainly on university libraries.

【解析】本题为细节题，考察Elsevier 的情况，由“The Dutch giant Elsevier ... made profits of more than £900m last year, while UK universities alone spent more than £210m in 2016 ...”可知，Elsevier 依靠大学图书馆获得巨额利润，因此A正确。B 中的“existential crisis”并不是 Elsevier 所经历的，而是其他出版商面临的危险，C、D选项均未出现。