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4. Having good physical and psychological quality, no infectious diseases and no history of mental illness, and passing the physical examination in hospitals at or above the county level designated by the teacher qualification accreditation institution according to the "Standards and Measures for Physical Examination of Personnel Applying for Accreditation of Teachers' Qualification".莱星开一家花店。他的家人都希望他尽快找一个女朋友，因为家里其他人都已经出双入对了。但他很喜欢单身的状态。有一天他去参加婚礼和婉碧在家族杂志担任编辑助理，一起接到了新娘丢出的花束。婉碧也是一个单身主义者，她不认为这个花束会改变她的想法。婉碧杂志社策划了一个儿童学习插画的读者联谊项目需要请莱星作为导师。莱星和婉碧被莱星的爸爸等人集中在一起，因为他们希望这两人成为一对。莱星跟踪妹夫误会婉碧是破坏他妹妹家庭的人。后来才知道他们是因为婚前互相了解不够才关系破裂。然而，莱星发现他的侄女丁丁，和缇塔出去约会。婉碧和莱星知道缇塔不是好人，而婉碧有能力去调查缇塔的背景。婉碧的家庭知道后希望婉碧和孔星结婚，但婉碧并不爱孔星。同时，莱星也和别人说他在和婉碧约会，但他认为孔星和婉碧更般配。这个混乱如何结束？莱星和婉碧能走到一起吗？每一个单身都会获得幸福吗？(two) forging or altering bills and prescriptions to defraud medical security fund expenditures, or reselling basic medical insurance drugs and consumables;Let's first implement the following simple publish-subscribe mode. The code is as follows:As mentioned above, SYN attacks can be prevented by increasing the backlog queue. In addition, reducing timeout time also enables the system to process more SYN requests. We know that the timeout timeout, that is, the half-connection lifetime, is the sum of the timeout times that the system waits for all retransmissions. The larger this value, the longer the half-connection takes up the backlog queue and the fewer SYN requests the system can handle. In order to shorten the timeout time, it can be realized by shortening the retransmission timeout time (usually the first retransmission timeout time) and reducing the number of retransmissions.