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Although the local authorities have requirements, airlines will raise some thresholds on the local authorities' requirements to ensure their own recruitment quality. For example, some students will only accept the requirements if their English level reaches IELTS 5.5 or above. Similarly, the threshold for physical examination will also increase accordingly.Ctrl + F: Controls whether to implement automatic object capture (F3)他陈余也是有错误和责任的。新上任的小学女教员芳贺稻子（吉濑美智子 饰）现年35岁，拥有10年的教龄，可谓经验丰富，人称“钢之女”。任职于爱河小学的稻子被委托教导四年三班。这个看似普通的班级却先后让三任班主任辞职离去，而辞职的原因却不明。表面上天真无邪的四年三班的小朋友们，背地里到底做了什么，让大人们摇头离去。稻子带着疑惑开始了和这群小朋友及他们背后的家长的战斗。Greece: 5,000A TCP connection is a quad, and a connection is uniquely determined by the source IP, the source port, the destination IP and the destination port. Therefore, if C wants to forge the packet from A to B, it should fill in the above-mentioned IP header and TCP header with the source IP, source port, target IP and target port. Here B is the server, IP and port are open, A is the target we want to attack, IP certainly knows, but the source port of A is not clear, because it may be randomly generated by A. Of course, if we can find out the rule of generating source port for common OS such as Windows and Linux, we can still do it. In addition, we can step on the connection port of Car A through a large number of controlled hosts.