A.腰3神經(jīng)根 B.腰4神經(jīng)根 C.腰5神經(jīng)根 D.骶1神經(jīng)根 E.骶2神經(jīng)根
A.尺神經(jīng) B.橈神經(jīng) C.正中神經(jīng) D.肌皮神經(jīng) E.腋神經(jīng)
A.5°~10° B.10°~20° C.20°~30° D.30°~40° E.40°~50°