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历史早已注定了，项梁或许并不成功，但项羽一定能完成他的未竟的事业。Public void method () {宁静郡主尚能不动声色，香云气得暗自磨牙。Is to create a factory class to create instances of some classes that implement the same interface. First, look at the following diagram:《世上最美丽的离别》讲述一位平凡的母亲在人生的最后时光里，与家人重归于好享受最后亲情的感人故事。3. Link AttacksPrinciple: Traditional tobacco is smoked by ignition. The temperature of tobacco when burning reaches 800 degrees. Nicotine, carbon monoxide, tar, etc. will be produced in the process of tobacco burning. At the same time, tobacco itself also has fragrance released. Smokers are mainly satisfied by smoking nicotine and tobacco fragrance. There are more than 2,000 kinds of harmful ingredients produced by smoking, The main components that cause harm to human health come from tar produced in the combustion process, However, the working temperature of the heating non-burning electronic cigarette is about 300. Not more than 300 degrees, Tar is mainly produced at over 400 degrees, In other words, Heating does not burn electronic cigarettes. Due to the relationship between temperature, A small amount of tar is produced, which can be ignored. Moreover, the temperature at which heating does not burn is only about 300 degrees, so there is no combustion, no open flame and no soot. However, the aroma and smell of tobacco are still released, and smokers can also obtain nicotine, so that smokers can also obtain the feeling of smoking real cigarettes.