[单选题]
11.20: The transistor is a, 69r*twbasll:li+aw- a 7kkl solid piece of se4r28av zjj) 5a u75zszokje7wmiconducting material with many applications in electronics. The initial development of transistors and the Nobel Pr2v7as5zkaj ue z5 wj7jzo84) rize awarded for its invention occurred closest to which calendar year?
