  It is found that in the SM the Ward-Takahashi(WT) identities of the
axial-vector currents and the charged vector currents of fermions are invalid
after spontaneous symmetry breaking. The spin-0 components of Z and W fields
are revealed from the invalidity of these WT identities. The masses of these
spin-0 components are at $10^{14}$GeV. They are ghosts. Therefore, unitarity of
the SM after spontaneous symmetry breaking is broken at $10^{14}$GeV.
