题目

2.[判断题](A AND B) OR C的检索结果与A AND B OR A AND C的检索结果相同A 对B 错

2.[判断题](A AND B) OR C的检索结果与A AND B OR A AND C的检索结果相同 A 对 B 错

题目解答

答案

根据布尔运算优先级，A AND B OR A AND C 等价于 (A AND B) OR (A AND C)。对比 (A AND B) OR C 与 (A AND B) OR (A AND C)： - 当 A = F，B = T，C = T 时，前者为 T，后者为 F。 - 当 A = F，B = F，C = T 时，前者为 T，后者为 F。显然，两者结果不完全一致。因此，(A AND B) OR C 与 A AND B OR A AND C 的检索结果不同。答案：B 错