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3. "Tail light" refers to a white light placed as close as possible to the stern of the ship, which displays uninterrupted light in a 135-degree horizontal arc. Its device shall make the light display from the right rear of the ship to 67.5 degrees on each side.宣布续订科幻剧《12 Monkeys》第二季。5.4. 2面对丈夫欺骗、出轨、背叛，在婚姻这座围城里，作为妻子的她该如何选择？Compared with resource consumption attacks, service consumption attacks do not require too much traffic. They mainly carry out accurate fixed-point attacks according to the characteristics of services, such as CC of the Web, retrieval of data services, download of file services, etc. Such attacks are often not aimed at congesting traffic channels or protocol processing channels. They are busy situations in which the server always handles high-consumption services and thus cannot respond to normal services. The detailed schematic diagram is as follows:是的。Threads a > A and B enter the first if judgment at the same time. B > A enters the synchronized block first, and since instance is null, it executes instance=new Singleton ();