<style face="normal" font="default" size="100%">Implementation of the Type-Variety Principle in Modern Teaching and Learning Methods and Realization of Scientific Research</style>

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3<style face="normal" font="default" size="100%">Implementation of the Type-Variety Principle in Modern Teaching and Learning Methods and Realization of Scientific Research</style><style face="normal" font="default" size="100%">Implementation of the Type-Variety Principle in Modern Teaching and Learning Methods and Realization of Scientific Research</style>