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Endothermic theory: When the flame retardant is heated, endothermic reactions occur, such as decomposition, melting, sublimation, phase change, etc., which make the fiber dissipate heat rapidly and fail to reach the combustion temperature.To obtain the qualification of a preschool teacher, one must have a major in preschool normal education from a secondary specialized school or a secondary vocational school or above. Non-kindergarten teachers' major graduates need a college degree or above to enter for the examination.杨寿全是不愿翘儿参与的，本想阻止，但见儿子毫不顾忌，跟千户聊得兴起，也只得不好再说什么。在法兰克福，一位年轻有才华的嘻哈制片人在与天际线唱片公司（Skyline Records）签约时，得到了一个千载难逢的机会。但是，当唱片公司老板的黑帮兄弟从流亡中归来， 并要求分得一杯羹的时候，音乐、集团犯罪和高收入世界发生了冲突。This paper summarizes the working principle, structure, specifications and models of time, and other related knowledge to help you understand the relevant contents of time relay more comprehensively.Private String password = "root";Judge whether the current click event is within the coordinate range of the sub-view, and the sub-view does not move in the coordinate system (perform animation). If the sub-view meets the above two conditions, then the click event is