yes and no...
I've tried, and it allows me to extract some parts of the file, but I'm not interested in extracting them, but rather in knowing whats in them without having to extract them, much like the way you can use file-roller to see what's inside a compressed file without actually decompressing it.
While writing this post I suddenly got inspired:
unrar l -kb file.part (very complete info)
unrar t -kb file.part (more consice and maybe more readable)