2, generally put some books that are not very useful, it is best not to put too many, in case they are all thrown together, ask the librarian to return your books, so that you can find them yourself when he is happy.

3, it's best to go every day, sometimes you eat in the morning and it's gone in the afternoon.

Generally, there are many people on the third floor, and the light is not very good when collecting books from the third floor. The fourth floor is the best, and the fifth floor is cold in winter. In some places, the roof is low, compared with not many people.

You can't go to class at ordinary times, so you'd better ask your classmates from other departments for help.

Supplement: In fact, it is better not to occupy space. You can have it anytime. That's not enough. If everyone wants to occupy a place, public resources will be privately owned. The administrator will collect books from time to time. As long as a classmate complains that someone is occupying the place, the administrator will find him a place with books but no one, and then start collecting books. Everyone is studying, so there is no need to think about it in class.