A.在腰間隙約5~6mm B.中胸部約3~5mm C.下頸部1.5~2mm D.在頸屈時(shí)T1間隙可達(dá)3~4mm E.在L4~L5間隙可達(dá)7~8mm
A.40000 B.50000 C.60000 D.65000 E.80000