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However, offline organizations also have many limitations in the process of large-scale development. First, their enrollment and teaching staff construction are limited by regions. Second, it is facing the problem of expansion in different places brought about by the choice of stores and different policies for running schools in different places. Third, the investment required for the construction and management of its stores is relatively heavy. Fourth, there is a shortage of outstanding management talents and it is difficult to duplicate store management talents.Disadvantages: Too many similar objects are generated, which is not easy to troubleshoot!Modules in Node.js run as singletons after loading and follow the principle of value passing: if it is an object, it is equivalent to a reference to this object.各路将军何时进京等等。战场局势瞬息万变，有一支预备队在手中，可以说就多了一张底牌。严嵩面皮一抽。但他不是一个人在战斗，他有黑科技。