【单选题】以下哪个检索式查出的文献数量最多?
A. (a or c)and b B. a and b and c C. a and b or c D. a and c
A. (a or c)and b B. a and b and c C. a and b or c D. a and c
举一反三
- 以下哪个检索式查出的文献数量最多？
- 以下哪个检索式查出的文献数量最多？ A: computer * design B: computer + design C: computer - design D: “computer design”
- 以下哪个检索式查出的文献数量最少 A: a and b and c B: (a or c)and b C: a and b or c D: a and c
- 以下检索出文献最少的检索式是 A: A. A and B B: B. A and B or C C: C. A and B and C D: D. (A or B) and C
- 以下检索式哪个检出的文献量最多 ( ) A: A AND B OR C B: (A OR B) AND C C: A AND B AND C D: A OR B OR C