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In order to make good use of the principle of composite reuse, we first need to distinguish the relationship between "Has-A" and "Is-A".杨光在路上机缘巧合的几次不文明行为被电视台播出，成了反面典型。不甘心的杨光拉上条子，准备自己拍摄新闻当成生财之道，却一次次被电视台拒之门外。 保安队为杨光配发了一部DV，杨光拍摄保安队队员的各种生活，获得了大奖。杨光的同学是妇产科主任，同事邻居纷纷来找杨光帮忙做流产手术，碍于面子，杨光 一次次地向孙蓝求助，惹出很多麻烦。金董事发现条子是自己的亲生骨肉，条子的身份骤然改变成为“金条”，金炳则被扫地出门到了条子家。金炳把杨光和胡 同里的生活描绘在画纸上，发现这就是他追求的最质朴的艺术。条子在富贵的生活中觉得失去了自我。金董事长重病中，要见金炳，金炳面对垂危的金董事长说 出了原来当初是他自己调换了血样，而自己确是金董事长真正的骨肉。最终父子相认，条子又回到胡同继续自己卖水果的生活。(3) The principle of electric time relay is similar to that of clocks and watches. It is delayed by the internal motor driving the reduction gear to rotate. This kind of relay has high delay accuracy and wide delay range (0.4 ~ 72h), but its structure is complicated and its price is very expensive.林聪恢复了紊乱的心绪，大大方方地抬头看着他脸，笑着用力点头道：嗯。A generic term for boards processed by printed circuits or printed circuit processes.