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[问答题] 看火操作最重要的三个参数是什么?为什么?

看火操作的三种基本控制是什么? You are underway and pass by a lighthouse.Its light,which was white since you first sighted it,changes to red.This means(). ["The light is characterized as alternately flashing","The lighthouse has lost power and has switched to emergency lighting","It is the identifying light characteristic of the lighthouse","You have entered an area of shoal water or other hazard"] 为了解决所谓的“最后一公里”问题,达到安装迅速、价格低廉的目的,作为接入网技术中的一个重要部分――()技术便应运而生了。 ["有线接入","无线接入","ADSL接入","VDSL接入"] 封闭现象对计量的影响是什么? 何谓材料的屈服极限、持久极限、蠕变极限和疲劳极限。 看火操作最重要的三个参数是什么?为什么?
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