[填空题]
To get an idea of how (j2kqs(liyv/ much thermal energy is:xu8j( 7 3j equ.pp9z(aw9 k4amevvhp contained in the world’s oceans, estimate the heat liberated when a cube of ocean water, 1 km on each side, is coo :ppv( ue 9m479j wx(hvkqae.8 jua3pzled by 1 K. (Approximate the ocean water as pure water for this estimate.) $ \times10^{ 15}\,J$