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We know that TCP protocol opens up a relatively large memory space backlog queue to store semi-connection entries. When SYN requests continue to increase, and this space causes the system to discard SYN connections. SYN cookies technology is designed to enable the server to process new SYN requests even if the semi-connection queue is full.妇产科医生金麒麟事业有成家庭稳定，唯一的遗憾是没有孩子，可身为刑警队副队长的老婆贾琼花因为童年阴影对孩子非常抵触，就这样俩人从恋爱到结婚已整八年，生孩子这事根本就没影。焦急的金家公婆抱定不见孙子不回头的信念，杀到城里住进了儿子家，风波顿时升级成了战争。几番纠葛之后，怀孕成了功课，关爱也就成了压力，琼花日渐烦躁，工作上差点出错。经历了诸多风雨的琼花最终理解了公婆，也让她对孩子有了些许的渴望，但是怀孕率极低的检查结果却令她目瞪口呆。琼花经受不住命运的作弄，选择一走了之。在山区的希望小学里，金麒麟找到了琼花，彼此对婚姻的承诺，对爱情的忠贞，对生活的热爱，在那些纯真的孩子们身上全都找了回来。奇迹发生了，琼花居然怀孕了。生活永远在回报那些热爱生活的人。觉得他长得跟玉米有些像，我二人怕被大人责罚，就用他混了大人。少爷放心，我一准按少爷吩咐的去做。After Baud was injured, he shouted to his countrymen in Inner Mongolia, "Come out!" But no one dared to move.众人不料郑氏忽然这样说，刚看上去好像不高兴呢。Is to define a main method calculate in the AbstractCalculator class, calculate () calls spilt (), etc. Plus and Minus inherit the AbstractCalculator class respectively, and implement the call to subclasses through the call to AbstractCalculator, see the following example: