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(1) Initialize the Initiation Dispatcher, and then register several Concrete Event Handlers into the Initiation Dispatcher. When the application registers the Concrete Event Handler with the Initiation Dispatcher, it specifies the event of interest at the same time of registration, i.e. The application identifies that the event handler wants the Initiation Dispatcher to notify it when certain events occur, the events are identified by the Handle, and the Concrete Event Handler holds the Handle. In this way, the events---> Handle---> Concrete Event Handler are associated.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.崔民国（陈奕迅 饰）与老婆张静宜（白冰 饰）十分恩爱，但也深感房贷压力。某日，崔民国遇到了调香大师好友Tony（庾澄庆 饰），后者发现了他对气味的天分，拉他加盟公司。不过，由于老板（刘若英 饰）明令禁止招收已婚男人，所以崔民国只得隐瞒结婚事实。起初，他遭到了老板前任秘书的奚落，被女同事们嘲讽。但是，高薪水还是让他跟老婆有了交代，这对隐婚男女也对地下工作乐此不疲。在一次应对日本客户“回忆”难题时，崔民国挺身而出，精彩解围，得到了老板的赏识。此后，他被经常要求加班，哪怕节假日也不放过，引发老婆极大不满。在请教闺蜜——情感专家如小果（秦岚 饰）后，崔民国被老婆鉴定为出轨，夫妻关系闹得很僵。与此同时，崔民国却留意到老板对明星阿伦（林依伦 饰）的关注非同寻常……8-5 Cities: Write a function called describe_city () that accepts the name of a city and the country to which the city belongs. This function should print a simple sentence, such as Reykjavik is in Iceland. Specifies a default value for the formal parameter used to store the country. This function is called for three different cities, and at least one of them does not belong to the default country.遵循皮克斯“光年”的制作。/wave