问题描述：
refer to和look up的区别
We should own an English dictionary which we can_____if we meet new words
为什么选refer to不选look up?
怎么区别?
We should own an English dictionary which we can_____if we meet new words
为什么选refer to不选look up?
怎么区别?
问题解答：
我来补答展开全文阅读