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3. Aircrew Physical Examination CertificateBridging mode is to separate things from their concrete implementation so that they can change independently. The purpose of bridging is: Decoupling abstraction and implementation, So that the two can be changed independently, Like our commonly used JDBC bridge DriverManager, when JDBC connects databases, it switches between databases without moving too much code or even at all. The reason is that JDBC provides a unified interface, each database provides its own implementation, and a program called database driver is used to bridge. Let's look at the diagram:Therefore, the opportunity and duration of the NPC and CPPCC reporters' questions are all very tight in the eyes of their peers. It is also because of this that conflicts among journalists in major conferences often occur.大家都是从小一块长大的，说笑起来，都不觉得娶个将军媳妇有什么不好，觉得这样才荣耀，因此缠住板栗，说大家都是自己人，应该先透露些消息出来。这是为了我瓯越族的大事，明侯身为先王子孙，有义务大义灭亲，保全族人……明侯，切莫在犹豫……一时间各种各样的劝谏，在姒明的耳旁响起的。建国初期，只懂科研不懂生活的“傻子”物理学家王怀民留苏归国后不久，妻子就因难产而亡，妇科医生杨佳蓉主动承担起照顾新生儿的责任。1958年二机部九所成立后，王怀民与科学家彭雄飞、黄凯华等人加入九所开始了原子弹研发工作。他们在研发过程中渡过了研发条件艰苦、自然灾害、中苏关系破裂等重重危机。同时，军人陶志纲带领着军队在罗布泊无人区中建立起试验基地。解决了设计方案、浓缩铀提炼等难题后，科学家们自主研发的原子弹终在1964年成功引爆。可是王怀民却因为长年艰苦工作和核辐射患上癌症，在生命的最后，王怀民终于明白生活的真谛，与杨佳蓉结为夫妻。之前一直没留意，今日龙且的返现似乎印证了这个猜想。