Dependences on time of the forward-shock radius R_f (thin solid line), the reverse-shock radius R_b (thin dashedline), the forward-shock velocity V_f (thick solid line), the reverse-shock velocity |V_b| (thick dashed line), the ratio of CR energy and energy of supernova explosion E_cr ∕E_sn (thick dotted line), and the magnetic field strength (thick dash-dotted line) in the shock radius (r = R_f).