If there are more than two numbers in certain list, is each of the numbers in the list equal to 0?
1) The product of any two numbers in the list equal to 0.
2) The sum of any two numbers in the list equal to 0.
Answer: B(sorry, 之前写错了)
请问为什么啊?因为我选的D
条件1 里面 任意两个数的乘积都是0
如果这个list上只有一个数不是0 别的数都是0 则满足条件1
如果list上全部都是0 也满足条件1
所以条件1不足以判断
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