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Catalytic dehydration theory: mainly refers to changing the thermal cracking process of fibers to dehydrate and prevent the generation of combustible substances.以都市单身人士为背景的情景喜剧，六位主角分别是：莫妮卡·盖勒，职业是厨师，爱管闲事，不服输，小时候肥胖，成绩不如哥哥；瑞秋·格林，莫妮卡的高中同学，从与牙医未婚夫的婚礼上逃离，未经世事的医家千金小姐，个性娇纵，没什么主见，由不愁吃穿到自食其力吃尽苦头，本来是“中央咖啡厅”的服务生，后来进了服装公司做采购助理；罗斯·盖勒为莫妮卡的哥哥，于高中时即暗恋妹妹的同学瑞秋，但始终不敢表白，个性有点死板，职业是博物馆考古学家；钱德·宾为罗斯的大学同学，喜好逞口舌之利，有点神经质；菲比·巴费为莫妮卡的旧室友，后因受不了其洁癖而搬走，智商较低，但傻得可爱；乔伊·崔比昂尼与钱德为共租公寓的室友，四肢发达，头脑简单，是一个典型的在贫困边缘挣扎的演员。如此一来江北防线也将会漏洞百出。The policy pattern defines a series of algorithms and encapsulates each algorithm so that they can be replaced with each other, and the changes in the algorithms will not affect the customers who use the algorithms. It is necessary to design an interface to provide a unified method for a series of implementation classes. Multiple implementation classes implement the interface, design an abstract class (optional, belonging to auxiliary class), and provide auxiliary functions. The diagram is as follows:In the "Learning Massive Open Online Course" section, free video courses are divided into 5 categories, including social law, science, technology, agriculture and medicine, humanities and philosophy, politics and economy, and others, totaling nearly 200 courses. This includes 16 social law courses such as "Operations Research", "Tort Liability Theory" and "Communication Psychology". "Diagnostics of Traditional Chinese Medicine", "Antenna Principle", "Astronomical Exploration" and other 63 science, technology, agriculture and medicine courses, "Nine Lectures on the Essence of Marxist Philosophy Principles", "Guan Zhong's Management Thought of Chinese Famous Phase" and "Five Types of Poetic Life" and other 60 kinds of human history and philosophy courses, 15 kinds of political and economic courses such as "CPC Tax System", "Political Ethics" and "Corporate Finance" and 24 kinds of other courses that have not yet been classified, such as "Self-shaping: Five Elements of Success", "Gem Processing Technology" and "Cosmetic Appreciation and Application".女大学生加穗子是一个"被保护过度的典型典范"。凡事都依靠父母解决，无忧无虑地长大，加穗子就像一个"在无菌环境下培养出来的神奇人类"。21岁的她，到了该找工作的年龄，但是别说是兼职了，她甚至从未给自己挑过衣服，或单独乘坐电车，只有别人为自己拍照，从不曾为别人按下过快门。这样的加穗子终于走出抗菌的温室，一头扎进这个满是细菌的世界。然后她才明白"自己跟别人不一样"。然而把女儿当成闺蜜的母亲，和过度依赖女儿的父亲无法维持内心平衡，导致家庭走上分崩离析的道路。此时，加穗子和周围的人发现沉睡在"温室里的加穗子"心中的真正力量。她经历各种试炼与挣扎，最后成为了"家庭"这一小小王国的女王。