关于材料和技术的应用,下列说法中正确的是          (   )

关于材料和技术的应用,下列说法中正确的是            

A. 我们日常生活中使用的二极管是由导体制成的

B. 电视机遥控器是利用紫外线来工作的

C. 超导体没有电阻,所以不适合做输电线

D. 微波炉是利用电磁波来加热食品的

答案

D 【解析】日常生活中使用的二极管的种类很多,绝大部分都是由半导体制成的;电视机遥控器是利用红外线来进行控制的;超导体的电阻为零,做输电导线可以减小电能损失,因此,适合做输电线;微波炉是利用电磁波来加热食品的.故选D.

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