Try to find something nice to say to her everyday, compliment her hair or nails or makeup or shoes, or how well she gets on with everyone, or how well she knows her job, anything positive. And ignore the rest. If you rise to the bait it'll just get worse.
I worked on a cornflake packing line when I was at college many moons ago and it's very true, these people are there for the rest of their lives, you're only there for a few months so you can put up with it for the money you'll earn, with the knowledge that you have a future somewhere else.