[单选题]
The moment of inertia of a 4: 3 pnbm9yr6 uf8bzfl*s0f ahsohescacsl*+0;:9sb; s vnd,ubb8:iktlid cylinder about its axis is given by 0.5 MR2. If this cylinder rolls without slipping, the ratio of its rotational kinetki9 b,;0 e8 ct+;:sch:bsavs* lsubdnic energy to its translational kinetic energy is