Blackbody radiation VS Spectral Line emission

Suppose you have a blackbody at temperature T and a pure low-density
gas at the same temperature. For T, the blackbody radiation spectrum
can be plotted using Planck's theory. I understand that the spectrum of
the gas is zero for all wavelengths except for certain "emission
bands".

If you were to superimpose the gas spectrum onto the blackbody
spectrum, do the gas emission bands ever exceed the blackbody curve, or
is the latter curve the limit?

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