就是email or last name内个 我有朋友和我加同一人时就没有问email or last name

也许吧!

那时别人弄的啦,有些人不让不认识的人+自己,所以就设了这个东西,认识他的人就知道他的姓和他的email,就可以+他

好像16以下的都必须这样子啊。。。Confirm Add Friend Do you really want to add XX as a friend? Click "Add" only if you really wish to add XX as a Friend. XX only accepts add requests from people he/she knows. You must enter either XX 's last name or email address to send your request.Last Name: OR Email:

还有另外一个键啊

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