请帮我分析一下英语句子成分,并判断句子属于哪种结构,

请帮我分析一下英语句子成分,并判断句子属于哪种结构,
It is a little upsetting to read that a certain line describes a fight between a Turkish and a Bulgarian officer and to find that the line consists of the noise of their falling and the weights of the officers,"Pluff!Pulff!" A hundred and eighty-five kilograms.
It is……that……是主语从句吗?to read 作状语?还是倒装?最近刚学长难句,有点儿蒙,越详细越好,