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Publish-subscribe mode is also called observer mode. It defines a one-to-many relationship between objects, allowing multiple observer objects to monitor a topic object at the same time. When an object changes, all objects that depend on it will be notified.南极，一场坠机，婚庆公司老板吴富春（赵又廷 饰）和高空物理学家荆如意（杨子姗 饰）相遇，两个毫无共同语言的男女在南极腹地无人区冒险生存75天。在酷寒、没有物质供应、随处都是绝境的环境中，活下去已经变成每一天的最大愿望。在寻找救援的过程中，这对性格水火不容但命运却又相濡以沫的人，敬畏了自然，领悟了爱情。夜晚扎营之后，项羽便照例和范增在中军大帐之中商议军情。这鱼是你家翘儿炖的。The reason for this situation is that the sex of the baby is different and the parents have different ways of raising it. For girls, parents will not only provide girls with toys such as dolls, but also support them to contact cars. For boys, parents will try their best to avoid toys such as dolls with "girl's characteristics".3. Candidates can only answer questions after the test bell rings. Candidates are not allowed to enter the examination room after blowing the boundary whistle 15 minutes after the examination. You can leave the examination room within 30 minutes before the final examination.