[单选题]
11.20: The transistor is a solid piece of sg y (2x(dd:f e+p/3bjpedz )hnw2k7uoemiconducting matera(nx2wy 8vx /lial with many applications in electronics. The initial development of transivwn a82xl( /xystors and the Nobel Prize awarded for its invention occurred closest to which calendar year?
