2. 外语
  3. If a and b are odd integers, which of the following is an even integer?

If a and b are odd integers, which of the following is an even integer?

admin2022-11-20  78
问题 If a and b are odd integers, which of the following is an even integer?
选项 A、a(b-4)
B、ab+4
C、(a+2)(b-4)
D、3a+5b
E、a(a+6)
答案D
解析 a为奇数，则3a亦为奇数，b为奇数，则5b也为奇数，奇数+奇数=偶数，所以选择D。
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