∵|x1-1|+|x2-2|+|x3-3|+…+|x2002-2002|+|x2003-2003|=0,∴x1=1,x2=2,x3=3,…,x2002=2002,x2003=2003,∴2x1?2x2?…?2x2002+2x2003=2-22-…-22002+22003=22003-22002-…-22+2=22002-22001…-22+2=22001-…-22+2…=22+2=4+2=6.故代数式2x1?2x2?…?2x2002+2x2003的值为6.