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黎章抱拳应道：属下遵命。So far, a simple file upload program has been written. Of course, this is still a counterexample. The disadvantage here is the same as the first code in the light example. The program is full of if and else conditional branches. The state and behavior are coupled in a huge method. It is difficult to modify and extend this state machine. This problem is exacerbated by the complexity of the links between file statesTo obtain the qualification of a preschool teacher, one must have a major in preschool normal education from a secondary specialized school or a secondary vocational school or above. Non-kindergarten teachers' major graduates need a college degree or above to enter for the examination.粉红加更送上（三更），边码字边等着给你们加四更，有信心没？***说完那番话，大苞谷无意识地用右手摸摸小灰的狗头，哼了一声道：小灰倒是能干得很，就是不会说话。盲女叶轻如意外怀了真龙河神之子。她本是最平凡的存在，却偶然与河神相恋…This strategy is mainly implemented by imposing rate limits on scarce resources such as IP and accounts. A typical example of this rate limit is to require the user to resolve the verification code to verify whether he publishes too frequently, as shown above.