if there are more than 2 numbers in a certain list, is each of the numbers in the list equal to 0? 1. the product of any two numbers in the list is equal to 0 2.the sum of any two numbers in the list is equal to 0 对1有疑惑。。。。 任意两个数的乘积为0,可能list中有且只有一个非零数啊~~~ 那list中就不是全部为零了,回答is each of the numbers in the list equal to 0? 答案为NO么,但是可以退出确定的答案么,疑惑啊~~~ 还是我想错了???