Unit3 Conversation

What are these?

• Brandon: Excuse me. What are these?
• Christina: They're flash drives.
• Brandon: Oh, they're cool. And what's this?
• Christina: It's a tablet.
• Brandon: A tablet? Really? Wow! It's great!
• Christina: Yes, it is. It's a new model.
• Brandon: Huh ... and what's this?
• Christina: It's a tablet case.
• Brandon: Oh. It's ... interesting ... and different.

And what's this? and 这里是顺承的意思