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开关带横杠的是开是关

更新时间: 2021-08-29 14:13:40     

开。正常情况下,开关上一般都会有一个横杠和一个圆圈,即便没有圆圈,也会有一个横杠,横杠则代表开的意思有圆圈的话是代表关的意思。这是从0和1演变而来的,零则代表没有,也就是关闭而一代表一档。而电灯只有开和关,所以一就演变成了一条横杠,表示开的意思。在现在灯具的开关上,还会带有荧光设施,也就是横杠可以夜光也就方便,人们在夜间快速的找到开关的位置。

关键词: 开关

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