Since Pizza is still an abstract class, when we create a subclass of FactoryPizzaStore, we should also implement a specific subclass inherited from Pizza. If we only create a subclass of FactoryPizzaStore without a corresponding subclass of Pizza, what does our pizza shop sell?At present, what methods do we take to solve the attack? The first method shortens the waiting time and deletes the illegal request data packets waiting in the waiting queue as soon as possible. The second method is that the first handshake message is not put into the waiting queue. We return a 32-bit unsigned integer to the client as the Seq of the second handshake. The integer is obtained by adding a serial number of the server to the parameters requested by the user (including the requested address, port, etc.). If it is a normal user, it adds 1 as ACK after receiving this integer and returns it to the server. After receiving the data, the server subtracts 1 from this ACK and then performs inverse operation to obtain various parameters. Finally, the data sent out are compared. If they are completely consistent, it means that it is an effective response and stored in the corresponding data structure, otherwise it is not. Through this method, illegal requests cannot occupy system resources.古人根据五行相克的原理创造了五行秘术，分别是御金、生木、 凝水、炼火、祭土五种术法，并形成了五个对应的门派，其中，金门的御金术能操控金属、十分强大，金门曾经有一个神奇的秘宝——金扳指，其中封存着强大的金龙之力，然而，此秘宝随着金门衰落，早已下落不明，金门传人老杨带着儿子杨一斤隐姓埋名在桃源镇打铁卖菜维持生计，杨一斤长大后一心想要去外闯荡，干一番事业，但老杨希望儿子安安稳稳的度过一生，始终没有同意，父子矛盾就此展开… 田桂芳是数学文盲，修直求证祖冲之圆周率使用分割法，田桂芳依旧不懂，而且下了岗。修直知道蚂蚁天生是计算家，有独特的认路方法，人要靠记忆才能认路，但田桂芳总可以找到修直却是个谜。Undertake. Yixin Model: Unsecured Guaranteed Model Yixin Company was established in Beijing in 2006 and then launched P2P Platform for Yiren Loan. Different from the auction, when the investor decides to lend the funds in his hand, Yixin selects the borrower for him from among the loan applicants. The interest rate of the borrower is decided by Yixin according to its credit review, and the profit of the enterprise mainly comes from the service fee. Yixin's model is more like a combination of housing agencies and Taobao. Housing agencies collect housing resources, then contact buyers and charge agency fees after the transaction. The specific operation process is as follows: Yixin will break up the lender's money and make a multi-person loan contract to the lender. When the money reaches the third-party account, the contract will come into effect. Although Yixin does not have a contract between the lender and the borrower, Yixin's third-party account holder acts as the debt transferor for lending and borrowing, that is, the third-party account holder becomes Yixin's lender first, and after Yixin selects the borrower, the third-party account holder transfers the creditor's rights to the real lender. For each borrower recommended by P2P credit service platform, the lender has the right to decide whether to lend to the borrower of Yixin portfolio; The borrower repays the loan every month, the lender can dynamically know the repayment, income and other information of each creditor's right every month, and the lender can get the principal and interest repaid in the second month. Of course, lenders can also choose not to collect money but to continue to look for the next borrower in Yixin. This model was initiated by Yixin. Yixin mode has two main characteristics: Yixin's security system from the perspective of Yixin's operation mode, Yixin has stronger control over borrowers, and lenders中年男子海克特（Karra Elejalde 饰）和妻子克莱拉（Candela Fernández 饰）搬到郊外一幢别墅居住，他用望远镜观察四周的景物，却意外看到一个正脱去衣衫的妙龄女子。海克特心感疑惑，决定前往女子出现的灌木丛中查看一番，结果遭到一个手持尖刀、全身缠满绷带的男子的追杀。海克特仓皇之中逃入一所空旷的实验室内，并在其中的大水槽内躲了起来。次日，当海克尔回到家时，却看到另一个自己正和妻子搬家具，他不知不觉穿越时空来到了一天前。原来水槽是一个时空机器，海克特的命运无意间发生了改变……Sun开始从单恋中获得暗示，然后慢慢放弃了Kao。莫克通过这件事可能安慰了他。当太阳推着瑞恩远离莫克时，这个年轻人的无法控制的行为使他陷入了困境。由于他的野性令人着迷，太阳的严肃性使莫克有些沮丧。在这一切之下，两者开始互相照顾。然而，在莫克的危险生活中，他无法动摇自己的身份。但是也许他可以为Sun之类的人服务。
