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In the previous example of electric lights, a state mode program was completed. First, the Light class is defined, which is also called Context here. Then in Light's constructor, to create instance objects for each state class, Context will hold references to these state objects in order to delegate the request to the state objects. The user's request, that is, the action of clicking button, is also implemented in Context, with the following code:《邪恶力量》（Supernatural）由美国WB电视台制作，讲述灵异超自然现象大多来自于美国的都市传说和民间传说。(2) Connect your iPhone to your computer; If your computer does not have iTunes, please download and install it on your website.长寿人气剧集《科搜研之女》将首度推出剧场版！全20季，共254集都将成为剧场版的伏线！2021年日本国内公映，东映发行！After repairing and maintaining the building fire-fighting facilities and fire extinguishers, the fire-fighting facilities maintenance and testing institution shall make a logo containing the name of the fire-fighting technical service institution, the person in charge of the project, the date of maintenance and other information, and publicize it on the conspicuous position and fire extinguisher of the building where the fire-fighting facilities are located.小师爷父亲施随安为磨砺儿子，在绍兴城内散发“行侠令”。小师爷通过行侠仗获得十张“行侠令”便可得到梦寐以求的《师爷宝典》。在这个目标的激励下，小师爷更坚定了乐于助人的信念，用智慧和勇气帮助身边的人，开始了一场寻找“行侠令”之旅。Picture