Tom: Hello, Li Ming.
Li Ming: Hello, Tom! Look, this is my family.
Tom: Oh. Who's she?
Li Ming: She is my mother. She's a teacher.
Morn: Nice to meet you, too.
Li Ming: Welcome to my home. This is my room.
Tom: What's on the desk?
Li Ming: It's my bag. It's yellow.
Tom: It's very beautiful.
根据对话内容，判断正误。
