[填空题]
What is the specific heat of a metal subpkw0;ly*pik vz 6 ea*e:27 f(kk p9rqgstance if 135 kJ of heat 1l-5q ,t wdsn0knnrn*is needed to raise 5.1 kg of the metk w51 n,t0 -nlsnd*nrqal from 18.0$^{\circ}C $ to 31.5$^{\circ} C$ ? $J/kg\cdot\,C^{\circ} $