题目
以下关于CNKI数据库逻辑运算符优先级排序中那一项是正确的()A. NOT = AND = ORB. AND > OR > NOTC. NOT > AND > ORD. OR > AND > NOT
以下关于CNKI数据库逻辑运算符优先级排序中那一项是正确的()
A. NOT = AND = OR
B. AND > OR > NOT
C. NOT > AND > OR
D. OR > AND > NOT
题目解答
答案
A. NOT = AND = OR
A. NOT = AND = OR
B. AND > OR > NOT
C. NOT > AND > OR
D. OR > AND > NOT