  In the framework of pertubative QCD it is argued that in the elastic
$ed$-scattering at $Q^{2}\sim$ few $(GeV/c)^{2}$ the light-cone-frame
helicity-flip amplitudes could not be omitted. The obtained $\frac{B}{A}$ ratio
of Rosenbluth structure functions is shown to be in a good agreement with
experimental data. The high $Q^2$ behavior of tensor analysing power $T_{20}$
is discussed.
