A.1/2或1/3 B.1/2或1/4 C.1/3或1/5 D.1/3或1/4
A.NRA B.PRA C.NPC D.NPA
A.動眼神經(jīng) B.外展神經(jīng) C.滑車神經(jīng) D.副交感神經(jīng)