题目

Thus,in the American economic system it is the demand of individual consumers,coupled with the desire of businessmen to maximize profits and the desire of individuals to maximize their incomes,that together determine what shall be produced and how resources are used to produce it.
第一个it是个什么结构.干什么用的?

提问时间：2021-03-08

答案

it is...that 是个强调句,中间the demand of individual consumers,coupled with the desire of businessmen to maximize profits and the desire of individuals to maximize their incomes是被强调的部分.
常用的强调句结构是：
It is (was) 被强调部分+ that (who) + 句子其他部分.