If you want to ask people on the street, it is very important to call yourself. You can't just shout "hello". It's rude and rude. No one likes to hear others call themselves that. So "hello" and "hello" are polite expressions. Only in this way can passers-by stop and listen to their own questions. Secondly, when asking for directions, you should start with sentences such as "Excuse me" and "Excuse me" to show respect and courtesy to each other. It's too hasty to ask xx how to get there.

A library is an institution that collects, sorts out and collects books and materials for people to read and refer to. As early as 3000 BC, libraries appeared. Library has the functions of preserving human cultural heritage, developing information resources and participating in social education.