A number of audience were present in the registration center in the morning,the number of whom was

问题描述:

A number of audience were present in the registration center in the morning,the number of whom was
be present at是固定搭配吗?这里用“be present in" 是否正确?
到底是不是固定搭配哟,老师经常说be present at ,be absent from啊?

be present at 是固定搭配,
在这里前面和后面分开的
A number of audience were present, in the registration center是两个部分.不是be present in