若 a 和 b 为奇数，下列哪个表达式一定为偶数？可多选。
Correct answer(s):
- a + b
- a^2 + b^2
Topic
奇偶性与运算
Practice related MCQ quizzes and improve step by step.
Quizzes in 奇偶性与运算
Practice related MCQ quizzes and improve step by step.
若 a 和 b 为奇数，下列哪个表达式一定为偶数？可多选。