dell xps 13 9365:变反意疑问句

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Today's weather isn't as cold as it was yesterday.___?
答案是isn't it ?对不对?

is it?

is it

不对。应该是is it? 因为前面的句子里用的是否定,那么后面应该与之相反用肯定。

is it ?
前否后肯