If you arrived there 2000 years ago naked? No you can't carry books with you or any piece of equipment. What can you help them build? An airplane? An engine? Some medicine? I suddenly discovered that I can't build anything from scratch, I know the concept behind most technologies but can't even make proper steel. Penicillin can be made from rotten fruit, but I don't know how to extract it properly but it might start something. Yeah, I'm poorly equipped for technology transfer to the past.