The search engines work by means of _________.
A． arranging links to the Internet
B． submitting specific search term
C． updating a knowledge database
D． searching engine spiders
正确答案：B
细节推理题从最后一段“Theytonotcategorizelinkstowebplaceslikewebdirectoriesdobuttheyallowusersto’searchtheInternet’usingspecificsearchterms．”(它们不像网页目录那样可以将许多信息分类联系在一起但是它们允许人们使用特定的搜索术语“在网上查找资料”)得出选项B(submittingspecificsearchterms使用固定的搜索术语)为正确答案
