23.Is the sum of all the terms in a sequence of positive intergers an odd interger?
(1)The sequence is composed of consecutive intergers.
(2)There are 50 terms in the sequence.
ANS:C
我的答案是 B
為何A也要呢? 問題中不是包含了A的條件了嗎?
還是我理解錯誤了 ><