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一九三七年八月三十一日淞沪会战中，姚子青奉命率部五百余人守卫宝山县城。日军为扩大登陆地域，对宝山进行了海陆空协同的疯狂攻击。在装备落后，地势不利，没有援军的情况下，智勇双全的姚子青带领全营以寡敌众坚守孤城，灵活运用战术战略，从主动出击攻袭敌军到固守阵地顽强抵御，七日内击退了日军一次又一次的进攻，全营五百余人先后战死沙场。九月七日日军破城，姚子青率残部二十余人在城内展开激烈巷战，最终壮烈殉国。In the system, the client often needs to interact with multiple subsystems, which causes the client to change with the change of subsystems. At this time, the appearance mode can be used to decouple the client from each subsystem. Appearance mode refers to providing a consistent facade for a group of interfaces in the subsystem. It provides a high-level interface that makes the subsystem easier to use. For example, the customer specialist of Telecom can let the customer specialist complete the services such as charging telephone charges and modifying packages without interacting with various subsystems by himself. The specific class structure diagram is as follows:/angry《血誓》以女主人公覃岚的成长经历为主线，讲述了20世纪初期的革命故事。杜若溪饰演的覃岚是一个生长在大汉口的学生，大革命的浪潮唤醒了她，她和同窗相约投奔南方革命党，在探求男友的路上，不时卷入多方势力的争斗之中——时而成为郑家庄的交易筹码；时而成为龙潭山的砧上鱼肉；时而又成为田家寨的填房小妾，曲折的经历让她从一个少女成长为女中豪杰。最终，她带领着队伍走上了革命之路。Behavior patterns of objects-Use object aggregation to allocate behaviors.? The white balance of cloudy day mode is used when it is cloudy.