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On the right side of the form in Figure 1 is a QCalendarWidget component, which displays dates in the form of a calendar and can be used for date selection. QCalendarWidget has a signal selectionChanged (), which is transmitted after the date selected on the calendar changes. Create a slot function for this signal and write the following code:如果说绿萝这次生下的是男孩，可能性无疑要大一些，奈何她只生下一个女儿，这事情就不好说了。该剧讲述了常年扮演恶毒女配的漫画人物七七完成自我拯救并最终找到自己幸福的故事。If an attacker sends SYN packets quickly with their own undisguised IP address, this is a so-called direct attack. This attack is very easy to implement because it does not involve spoofing or modifying packets below the user layer of the attacker's operating system. For example, he can simply send many TCP connection requests to implement this attack. However, for this attack to work, the attacker must also prevent his system from responding to SYN-ACK packets because of any ACK, RST, or ICMP (Internet? Control? Message? Protocol) will cause the server to skip the SYN-RECEIVED state (go to the next state) and remove the TCB (because the connection has been successfully established or recycled). Attackers can do this by setting firewall rules, causing the firewall to block all packets (except SYN) to reach the server, or causing the firewall to block all incoming packets so that SYN-ACK packets are discarded before reaching the local TCP handler.等她琢磨了一些匪夷所思的点子，在山下树林内布置无数陷阱，把虎王山防卫的滴水不漏时，胖子等人就恨不得把她奉为女诸葛了。