题目

以下检索出文献最少的检索式是(2.0)A. a and b or cB. a or bC. a or b and cD. a and b and cE. (a or b) and c

以下检索出文献最少的检索式是(2.0)

A. a and b or c

B. a or b

C. a or b and c

D. a and b and c

E. (a or b) and c

题目解答

答案

D. a and b and c