  We propose a scheme to distinguish zero-energy peaks due to Majorana from
those due to other effects at finite temperature by simply replacing the normal
metallic lead with a resistive lead (large R k\Omega) in the tunneling
spectroscopy. The dissipation effects due to the large resistance change the
tunneling conductance significantly in different ways. The Majorana peak
remains increase as temperature decreases G T^(2r-1) for r=e^2 R/h<1/2. The
zero-energy peak due to other effects splits into two peaks at finite
temperature and the conductance at zero voltage bias varies with temperature by
a power law. The dissipative tunneling with a Majorana mode belongs to a same
universal class as the unstable critical point of the case with a non-Majorana
mode.
