  The mechanism of resonance enhancement of neutrino oscillations in matter and
some critical remarks to this mechanism are considered. Using of this resonance
mechanism is very important to examine the model of electroweak interactions
since the processes induced by this mechanism grow multiply. In contrast to the
electromagnetic and strong interactions in weak interactions, $P$-parity is
violated therefore a problem of mass generations in the weak interactions is
considered (the interaction must be left-right symmetric for mass generations).
It is concluded that a possibility of mass generation in the framework of the
weak interactions is not proved. The present experimental status of this
resonance mechanism is considered and it is done conclusion that this effect
has no clear experimental confirmation. For this purpose it is necessary to
fulfil precision experiments with solar neutrinos and the neutrinos passed
through the Earth matter.
