Import CD but cannot get the cover flow

Question

When I import songs/music from CD but I cannot get the cover list, why?

Answer 1

*1)Do I need to pay if I download the cover list from itunes store?*
No there's no charge to download artwork from the store
*2)My ipod has different library from my itunes, how can I sync to my itunes library?*
Not sure what you are asking here. Do you want to copy the songs from iTunes back to your computer? If you have any iTunes Music Store purchases the transfer of purchased content from the iPod to authorised computers was introduced with iTunes 7. You'll find details in this article: Copying iTunes Store purchases from your iPod to a computer
The transfer of content from other sources such as songs imported from CD is designed by default to be one way from iTunes to iPod. However there are a number of third party utilities that you can use to retrieve the music files and playlists from your iPod. You'll find that they have varying degrees of functionality and some will transfer movies, videos, photos, podcasts and games as well. Have a look at the web pages and documentation, this is just a small selection of what's available, they are generally quite straightforward. You can read reviews and comparisons of some of them here:
Wired News - Rescue Your Stranded Tunes
Comparison of iPod managers
TuneJack Windows Only
iPod2PC Windows Only
iGadget Windows Only
iDump Windows Only
SharePod Windows Only
iPodRip Mac & Windows
YamiPod Mac and Windows
Music Rescue Mac & Windows
iPodCopy Mac and Windows
iRepo Mac & Windows (iPhone and iPod Touch compatible)
iPod Access Mac & Windows (iPhone and iPod Touch compatible)
There's also a manual method of copying songs from your iPod to a Mac or PC. The procedure is a bit involved and won't recover playlists but if you're interested it's available on page 2 at this link: Copying Content from your iPod to your Computer - The Definitive Guide
3)Can I copy the cover for the ipod library?
I don't understand what you are asking here. You can add the artwork to the songs in iTunes and copy sync them to the iPod if that's what you mean. If you are managing the iPod manually you can add the artwork directly to the song on the iPod, however the artwork doesn't always display when you do this. In that case you can delete the song from the iPod and re-add a copy from iTunes that has got the artowk on it.