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If you recharge 200 yuan to Alipay, you can win 100% of 20 yuan's red envelopes. Of course, if you don't recharge, you can also draw a lucky draw. However, the probability is very low, basically you can't draw it, and of course you can also draw it.State mode refers to allowing an object to change its behavior when its internal state changes. The object seems to have modified its class. Divide this sentence into two parts by commas. The first part means to encapsulate the state into a separate class and delegate the request to the current state object. When the internal state of the object changes, different behavior changes will be brought about. The second part is from the customer's point of view, the object used has completely different behaviors in different states. The object seems to be instantiated from different classes, but in fact this is the effect of using delegates.故事讲述了丹麦潜水者的故事。在蓝色水的世界里，有那么一群辛苦的工作人员，每天都有新任务，接受新的挑战，然而，一切都不是那么顺利的，就像这部电影《潜水者》一样，灾难是否降临，答案即将揭晓。A dozen means 12, and a dozen socks means 12 pairs.Students who still don't understand can look at the effect together with the previous part.