问题
单项选择题
Modern computers are electronic and (8) devices. The basic building block of a modem computer is a (9) .
A) chip B) tubeC) transistor D) switch
答案
参考答案：A
解析： 略
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Modern computers are electronic and (8) devices. The basic building block of a modem computer is a (9) .
A) chip B) tubeC) transistor D) switch
参考答案：A
解析： 略