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Manyinventionshavehelpedimprovedourday-to-daylivesandar...
问题详情:Manyinventionshavehelpedimprovedourday-to-daylivesandarewellremembered,forexample,AlexanderGrahamBellforthetelephoneandThomasAlvaEdisonforthelightbulb.However,manyotherinventors’nameshavebeen...