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【单选题】
单选 (2 分 ) 每一篇数字文献,都有一个唯一的 ____ 码,通过该码可以准确地找到所要文献:
A.
IDF
B.
DOI
C.
DC
D.
ISSN
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】What is the main aim of book review? （单选）
A.
analyzing a perspective or argues a point
B.
analyzing or discussing researches previously published by others
C.
summaries and comments on a newly published academic book
D.
summaries, reviews and comments the research trends, the major discoveries, significant findings, the leading opinions on a particular subject.