超清无码A片在线观看不卡免费高清点播|超清无码A片在线观看不卡免费在线观看高清完整版

The Liskov Substitution Principle (LSP) is one of the basic principles of object-oriented design. The Richter substitution principle says that wherever a base class can appear, subclasses can certainly appear. LSP is the cornerstone of inheritance reuse. Only when derivative classes can replace base classes and the functions of software units are not affected can base classes be truly reused, and derivative classes can also add new behaviors to base classes. The Richter substitution principle is a supplement to the "open-close" principle. The key step to realize the "open-close" principle is abstraction. The inheritance relationship between the base class and the subclass is the concrete realization of abstraction, so the Richter substitution principle is the specification of the concrete steps to realize abstraction. --From BaiduChu can also see clearly that the reason is that there are too many of them. Let's describe them this way-it looks like a dark cloud rising out of thin air in the rainforest. "Zhang Xiaobo said.赐新重新把马友看作是事业上与爱情上的对手，于是向马友下了战书。百里香的存亡与爱情的选择使马友倍感压力……武工队队长梁湘和别动队队长洪越，联合行动，配合默契，在极端困难的情况下，与敌人展开殊死搏斗。凶残狡猾的鬼子司令川野三郎施展了多种阴谋诡计，妄图拆散武工队和别动队的联合。梁湘和洪越沉着应对，派人打入敌人内部，除掉了内奸，粉碎了川野三郎的阴谋。电磁专家巩锋失踪，原来是被鬼子劫持，并将被转移到国外。武工队和别动队与鬼子斗智斗勇，洪越带手下深入虎穴，查清了事情的来龙去脉，挖出了通敌叛国的江处长，捣毁了鬼子的秘密情报基地。被救出的巩锋看到我抗日武装奋不顾身的斗争精神，看到他们为百姓舍生忘死的行动，深受感动，义无反顾地走进了抗日队伍。梁队长和洪队长与战友们继续奋战在抗击日寇的前线。七十九岁的医生伊萨克．伯雷在献身医学界几十年之久后终于获得人们所颁赠的荣誉博士学位，于是开车前往多伦多。随行的还有他的家人。途中，当伊萨克从媳妇口中得知儿子竟恨自已自私的时候，他有所振动，坐在路边草坪上开始忘我地回忆自己的少年时代，同时也想到了自己的初恋情人堂妹莎拉。由幻想清醒过来的伊萨克，望着站立在他面前的与莎拉长得十分相像的少女与两名青年，他们都充满着青春的活力。伊萨克感悟并埋怨自已为了学问，将爱情等闲视之，时光水逝，美丽的青春和爱情一去不返……谷雨是一个充满理想、充满活力的年轻人，她出身教育世家、就读师范大学，申请到深海高中实习，担任了高一（1）班班主任。谷雨班上的学生各有个性，同她这位年龄相仿的“小老师”碰撞出闪亮的火花，他们对谷雨既喜欢、敬佩，又考验、“刁难”。面对学生们积习已久的做弊之风，谷雨别出心裁，干脆放弃监考，激励学生自律……失败了，也就是那么回事，结果是一样的。