I would ask the HR/Hiring manager in the company. Ask for an itinerary for your trip. If not available, ask if you need to prepare a talk, on what subject they'd prefer. If they don't seem have any specific requirement, better prepare some slides from your own research so that you can pull them out easily to aid your conversation during the interviews. You need to be very well prepared on your current research subject and be active during the one-on-one interviews.  

非常感谢楼上热心筒子essences的回答。

Typically if they don't ask you to do presentation, then it won't happen.  When we conduct interviews that last 5-6 hours, it's usually interviews only.  It's quite tiring to talk and be asked questions non-stop for that much time. They won't tell you to do a presentation without any heads-up. 

The best way is to confirm with them.

Ask them. It won't hurt. It is very very likely that they would ask you to give a presentation.