A.5%~8% B.15%~18% C.18%~20% D.65%~80% E.90%
A.黃韌帶 B.前縱韌帶 C.棘上韌帶 D.棘間韌帶 E.后縱韌帶
A.前屈 B.后伸 C.環(huán)轉(zhuǎn) D.左/右旋轉(zhuǎn) E.左/右側(cè)彎