指出下面这句话中的错误,并说明理由Three hours are enough to look at the pictures carefully.

指出下面这句话中的错误,并说明理由Three hours are enough to look at the pictures carefully.
指出下面这句话中的错误,并说明理由
Three hours are enough to look at the pictures carefully.

指出下面这句话中的错误,并说明理由Three hours are enough to look at the pictures carefully.
“are”改成“is”
three hours指的是时间的概念,是一个整体,为不可数名词