物理知识在平时的生产、生活中有着广泛的应用,下列说法中正确的

物理知识在平时的生产、生活中有着广泛的应用,下列说法中正确的是(     ) 

A.鞋底刻有不同的花纹,主要是为了增大鞋底与地面的摩擦力。

B.有些家用电器使用三脚插头和三孔插座主要是为了增强三脚插头使用时的稳定性。

C.电线的芯线外面包一层绝缘塑料,主要是为了增强电线的导电性。

D.钢丝钳钳柄上的橡胶套有凹凸不平的小颗粒,主要是为了美观。

答案

A

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