∵复数z满足z2+z+1=0∴z= ?1± 3 i 2 ∴z3=1又1+z+z2+z3+…+z2007=(1+z+z2)+(z3+z4+z5)+(z6+z7+z8)+…+(z2004+z2005+z2006)+z2007=(1+z+z2)+z3(1+z+z2)+z6(1+z+z2)+…+z2004(1+z+z2)+z2007=z2007=(z3)669=1