  Basing on the relations between a system of ODE and a system of parabolic
equations, we establish some general theories in heat transfer about quenching,
global existence and blowup phenomena, obtain the conditions(even watershed) on
f(u,v), g(u,v), a(x) and b(x) which let the solution be global existence,
quench or blow up, and estimate the bounds for blowup time and quenching time.
