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A program based on policy mode consists of at least two parts. The first part is a set of policy classes, which encapsulate specific algorithms and are responsible for specific calculation processes. The second part is the environment class Context, which receives the client's request and then delegates the request to a policy class. We first use traditional object-oriented to implement it.Resolution:+ ` + K. e3 g $s? /s% E F% O1937年，热河人佟家儒（杨志刚饰）背井离乡在上海聂中丞中学教国文，养女囡囡成了残疾，本想再次南逃的他被迫留下。目睹侵略者残害同胞，他忍气吞声只求保住性命。学生欧阳（张家溢饰）为国效力，急需助手，佟家儒硬着头皮帮忙。欧阳牺牲，佟家儒暴露被日本特务东村盯上，他巧妙周旋完成任务同时摆脱了嫌疑。欧阳上司杨逍被抓，佟家儒将他救出。妻子栀子刚生下儿子希望，却因保护杨逍被杀。半年中四个参与杀害栀子的凶手均被佟家儒杀死且不露马脚。东村苦于没有证据，试图用残酷的刑具逼佟认罪。共产党人组织教师、学生游行，营救了佟家儒。三年后，佟家儒拿自己当诱饵，帮助国共两党的同志们联合除了日本特务基地。日寇投降，东村不甘失败绑架希望，逼佟家儒与其决斗。战友们制服东村，营救希望。东村大骂佟是懦夫，佟家儒告诉他：“对待侵略者，中国人都有一颗勇敢的心。2. Select the Drawing Tool Format tab and click the button of the Shape Style Group as shown in the figure.然后是第二个、第三个，打得两人鬼哭狼嚎，就这么硬闯过去了。