中国大学MOOC: 如下哪个表达式同A>8 AND A<18是等价的？Which of the following expressions is equivalent to A > 8 AND A < 18?a. NOT（A<8）AND NOT（A>18）b. NOT（A<=8）AND NOT（A>=18）c. NOT（A>8 OR A<18）d. A<8 OR A>18
举一反三
- 如下哪个表达式同A＞8 AND A＜18是等价的？ which of the following expressions is equivalent to a＞ 8 AND A ＜ 18？ a. NOT（A＜8）and not（a＞18） b. NOT（A＜=8）and not（a＞=18） c. NOT（A＞8 OR A＜18） d. A: a B: b C: c D: d
- 如下哪个表达式同(A>8)&&(A[18)是等价的？Which of the following expressions is equivalent to (A]8)&&(A<18)? A: !(A<8)&&!(A>18) B: !(A<=8)&&!(A>=18) C: !(A>8||A<18) D: A<8||A>18
- 如下哪个表达式同A>8 AND A[18是等价的？Which of the following expressions is equivalent to A ] 8 AND A < 18? A: NOT（A<8）AND NOT（A>18） B: NOT（A<=8）AND NOT（A>=18） C: NOT（A>8 OR A<18） D: A<8 OR A>18
- 如下哪个表达式同A>8 AND A[18是等价的？Which of the following expressions is equivalent to A ] 8 AND A < 18? A: NOT（A<8）AND NOT（A>18） B: NOT（A<=8）AND NOT（A>=18） C: NOT（A>8 OR A<18） D: A<8 OR A>18
- 如下哪个表达式同A>8 AND A[18是等价的？Which of the following expressions is equivalent to A ] 8 AND A [ 18?a. NOT（A<8）AND NOT（A]18）b. NOT（A[=8）AND NOT（A]=18）c. NOT（A>8 OR A[18）d. A<8 OR A]18 A: a B: b C: c D: d