题目内容：

be present at和be present in都对吗?若都对请分别给出一个例句,并解释其区别

优质解答

How many people were present at the meeting yesterday.
They is present in the classroom.be present 出席的.到场的,存在的,in at 取决于其后的名词

追问：

第二句应为they are吧

追答：

Sorry笔误