Ras/MAPK信号通路的正确活化顺序为:( )A.1igand→RTK→Grb2→SOS→MAPKKK→MAPKK→MAPK→MycB.1igand→RTK→SOS→Grb2→RaS→MAPKKK→MAPKK→MAPK→MycC.ligaJld→RTK→Grb2→S0S→Ras→MAPK→MAPKK→MAPKKK→MycD.ligand→RTK→Myc→Grb2→Ras→SOS→MAPKKK→MAPKK→MAPKE.1igand→Grb2→RTK→Ras→SOS→...