Is this school the one you ever visited?和 Is this the school

换成陈述句就好理解了
this school is the one （that) I visited.变回原来的就是 this school is the school that I visited.
第二个句子变陈述就是,this is the school that I visited.没啥区别.但是,没必要是句子就来分析语法结构吧.理解就行了
再问： 哈哈，我都觉得句子中不需要过于着重它的语法结构，但是要分析了才好做题嘛！