  In this paper, we study the uniqueness of the steady 1-D shock solutions for
the inviscid compressible Euler system in a finite nozzle via asymptotic
analysis for physical parameters. The parameters for the heat conductivity and
the temperature-depending viscosity are investigated for both barotropic gases
and polytropic gases. It finally turns out that the hypotheses on the physical
effects have significant influences on the asymptotic behaviors as the
parameters vanish. In particular, the positions of the shock front for the
limit shock solution( if exists ) are different for different hypotheses.
Hence, it seems impossible to figure out a criterion selecting the unique shock
solution within the framework of the inviscid Euler flows.
