本一a和本二的区别

A4.1 Routine Inspection ItemsThe 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:(4) Selected comments from netizens: Death homework, this novel, Created a new thinking of this type of novel, The new school, whether it is the refinement of words, Or the plot, All show the author's profound knowledge of Chinese studies, fascinating, Let readers have a sense of substitution, the plot overlaps and there are foreshadowing everywhere. When you think the result of the story is a certain one, you do the opposite. I am extremely surprised. I can't help but want to read it. I am worried, happy, sad and excited about the hero. It can be said that this book, Death Homework, is a masterpiece in the recent online novel circle and is worth seeing!此番攻陷彭城，剿灭叛军尹旭和英布功不可没，表现出自不俗的实力，证明自己并非浪得虚名。他清楚，自己不过才华泛泛，除了身体好，其实也没什么过人之处。新奥尔良是美国圣诞节最狂欢的城市！一年一度的狂欢节使这个城市又疯狂起来了，但今年的狂欢节却更加的惊心动魄…… 德沃公园突然发生恐怖的地陷灾难，一名工人不幸遇难！身为市长助理的艾丽森马上前往现场察看。白天的惊慌还未完全散去，傍晚又有一处地方发生地下沧陷，整个城市都陷入了恐慌当中！艾丽森只有请求男友——地质专家马特帮忙勘察。 马特因几年前矿场的塌陷而心存阴影，不愿再涉足勘察工作。在女友艾丽森的坚持下马特终于同意。但马特认为整个城市随时都可能发生全部地陷！今年的狂欢活动应停止举行，并马上疏散人群，做好保护工作……政府最终并没有采取马特的意见，狂欢活动照常举行。但马特仍未放弃勘察！ 最终马特能否拯救整个新奥尔良城市呢?杨长帆长舒一口气说道：戚将军，在下知道，将军现在心很乱，在下心里也不平静。