TohelptheblindyoungL的知识精选

Tohelptheblind,youngLouisBraillecreatedasystem
问题详情:Tohelptheblind,youngLouisBraillecreatedasystem_________sixraiseddotsrepresentingdifferentletter;_____theblindcaneasilyrecognizeBrailwiththefingersnow.A.madeupof;but              ...
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