48、第一代电子计算机体积大﹑耗电多﹑性能低，其主要原因是受制于______。A.基础材料B.元器件C.传输方式D.技术水平 - 查题网

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48、第一代电子计算机体积大﹑耗电多﹑性能低，其主要原因是受制于______。
A.基础材料
B.元器件
C.传输方式
D.技术水平

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