歌世界末日什么意思？

How does the email header field 'thread-index' work?

I was wondering if anyone knew how the thread-index field in email headers work? Here\'s a simple chain of emails thread indexes that I messaged myself with.

What is the use of creating a constructor for an abstract class in Java?

I would like to know what purpose开发者_开发知识库 a constructor for an abstract class serves; as we do not instantiate abstract classes, why would we ever need such a constructor?there will be times

求代字开头的成语接龙！？

瘋子拿把刀 开发者_运维技巧 2022-07-17 12:01 里应外合、合衷共济、济弱锄强、强弩之末、末大必折。一、里应外合白话释义：外面进攻，里面配合接应。出处：《陈州粜米》：“则这官吏知情，外合里应。”朝代：元