at the library和in the library有什么区别?

at the library和in the library有什么区别? in the library还是at the library? at the library 和in the library 有什么区别?什么时候用前者?什么时候用后者? at the library和in the library两种都可以用吗? 急,十万火急 at the library和in the library两种都可以用吗? 急,十万火急 at the library 跟in the library有区别吗? in the early part of the 19th century 和 at the beginning of the 19th century 的区别. at the library at the mall at school at the pool 和 in the library .我知道有in school .in school =at school .有没有 in the mall 呢,in the pool 有in the library哦.究竟这几个怎么个回事啊.资料又都说全部用at .可是还有in in、on、at什么时候加the?比如为什么in the library,不是in library Look at the map in the library哪错了 at the library与in the library-When do your classes end?-They end at noon.Then I have a job at the library.请问:这里的at the library可以换为in the library吗? Look at the library look at sb in th mirror,in the local mine Do you have a library at school?. 急用 在线的人看看 英语好的!Do you have a library at school?yes,we do. And we have( )for school librarywhat are they?we have to be( )in the library.we hanve to put our backpacks and our umbrellas( )th At the 27th we____talk in the library 在购物市场用in the mall 与at the mall的区别 在图书馆用in the library 与at the library的区别 in the 19th 和in the 1980's