you might look at the date a book was published.怎么分析句子结构,是定语从句吗还是同位语从句.

定语丛句
主句是you might look at the date
丛句是a book was published
丛句是用来修饰date的，所以是定语丛句
同位语从句的从句部分必须跟date指同一个东西，如几月几号之类的