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Explosive wounds% Total 140%山芋粉丝滑，搁点香荽味更长——啊。毫无疑问，这是一个与众不同的《倚天》故事，期待张无忌变成冷酷霸道的魔教教主。The above design, as commented above, when executing the Resize method of SmartTest, if a rectangular object is passed in, when the height is greater than the width, the width will be automatically increased until it exceeds the height. However, if a square object is passed in, it will fall into a dead loop. The fundamental reason at this time is that rectangles cannot be the parent class of squares. Since there is a problem, they can be reconstructed so that both of them inherit from quadrilateral classes. The refactoring code looks like this:该剧描写了晚清举人程华强，弃官之后改卖米线，并把过桥米线做成了“天下一碗”的故事。该剧大部分外景都在红河州内拍摄，是央视首次将历史传统小吃的故事表现为“吃文化”的大戏。片中女主公对过桥米线独到精心的追求，被誉为中国版的《大长今》。The command mode is well understood. For example, the commander ordered the soldiers to do something. From the perspective of the whole thing, the commander's role is to issue a password, which is transmitted to the soldiers' ears and executed by the soldiers. Fortunately, the three are decoupled from each other. Neither side needs to rely on others, but only needs to do its own thing. The commander wants the result and will not pay attention to how the soldiers achieve it. Let's look at the diagram:SYN attack is a kind of DOS attack. It takes advantage of TCP protocol defects and consumes CPU and memory resources by sending a large number of semi-connection requests. SYN attacks can not only affect hosts, but also harm network systems such as routers and firewalls. In fact, SYN attacks can be implemented as long as these systems turn on TCP services no matter what systems are targeted. As can be seen from the above figure, the server receives the connection request (syn=j), adds this information to the unconnected queue, and sends the request packet to the client (syn=k, ack=j+1), then enters the SYN_RECV state. When the server does not receive an acknowledgement packet from the client, it retransmits the request packet and does not delete this entry from the non-connection queue until the timeout. With IP spoofing, SYN attacks can achieve good results, Typically, clients forge a large number of non-existent IP addresses in a short period of time, SYN packets are continuously sent to the server, and the server replies to the confirmation packets and waits for the confirmation of the customer. Since the source address does not exist, the server needs to continuously resend until it timeout. These forged SYN packets will occupy the unconnected queue for a long time, normal SYN requests will be discarded, the target system will run slowly, and in serious cases, the network will be blocked or even the system will be paralyzed.