求助：模考的一道题

franceeguan

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 the smallest of the integers in the list is positive.

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

我选E

franceeguan

thanks !The answer is C

lizhihuantu

选c吧~

一共偶数个数字，最大的和最小的数同号（相乘为正，则两数同正或两数同负）

那怎么算，答案都是正。所以1+2可以充分的

shelleyzhdai

seven numbers?

如果是6个数的话就是正，7个无法判断正负，选E