已满十八点从此点进入mv

//Get Child NodeThe next four patterns, including this pattern, are all the relationships between classes and do not involve inheritance. When learning, you should remember induction and the diagram at the beginning of this article. The observer mode is well understood, similar to email subscription and RSS subscription. When we browse some blogs or wikis, we often see RSS icons. This means that when you subscribe to the article, you will be notified in time if there are subsequent updates. In fact, in a nutshell, when an object changes, other objects that depend on the object will be notified and will change with it! Objects are a one-to-many relationship. Let's look at the diagram first:Note: The data of the article come from Internet Weekly, CIC Consultant, Sirui Research, etc. The advanced manufacturing industry collates the report. Please indicate the source for reprinting.　《黑钱胜地》宣布续订第四季！并确定将是最终季！爱情保卫战2020，节目把现实中青年男女在恋爱过程中遇到的各种困惑与矛盾搬上舞台，双方通过交流、沟通与争辩把内心的痛苦与困惑全盘托出。节目现场邀请情感导师为情侣提供理性分析、科学考量、恋爱指导和情感忠告，倡导正确的恋爱观、婚姻观、幸福观。同时也邀请明星夫妻等社会人士指导。