求助prep DS2 - 57

lyting5945 · 发表于 2011-9-2 17:51:02

57. 4761-!-item-!-187;#058&003968
A certain list consists of several different integers. Is the product of all the integers in the list positive?

(1) The product of the greatest and smallest of the integers in the list is positive.

(2) There is an even number of integers in the list.

lyting5945 · 发表于 2011-9-2 17:52:18

答案是C，可是题目并没有说是连续整数啊~难道several different integers一般是指连续整数？？

flyst7 · 发表于 2011-9-2 17:54:04

C吧

1. 最大和最小整数的成绩为正说明整个list里面所有整数同号

2. list里面整数个数是偶数个

1+2 product of all the intergers in the list is positive

flyst7 · 发表于 2011-9-2 17:55:27

答案是C，可是题目并没有说是连续整数啊~难道several different integers一般是指连续整数？？

-- by 会员 lyting5945 (2011/9/2 17:52:18)

不用是连续整数反正1里面说最小的和最大的乘积>0 整个list就全是负数或正数了剩下的就都是中间的呗

lyting5945 · 发表于 2011-9-2 18:19:12

啊，明白了！刚才怎么没转过弯呢呵呵~~谢谢啦

lyting5945 · 发表于 2011-9-2 18:20:02

C吧

1. 最大和最小整数的成绩为正说明整个list里面所有整数同号

2. list里面整数个数是偶数个

1+2 product of all the intergers in the list is positive

-- by 会员 flyst7 (2011/9/2 17:54:04)

嗯，明白了，谢谢~

求助prep DS2 - 57

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