apt question

[Radu Muschevici <ext2@gmx.ch>]

is it posible to have two distro lines in /etc/apt/sources.list
like this:

deb http://ftp.de.debian.org/debian/ testing main non-free contrib
deb http://ftp.de.debian.org/debian/ unstable main non-free contrib

and prevent apt from taking every package from unstable since it
has the newer version.

I want to run testing and only manually pick certain packages from 
unstable, like kde packages by entering something like:

apt-get install kdebase/unstable


how ist this possible?

thanks
Radu