单项选择题
A.1×9% B.2×9% C.3×9% D.4×9% E.5×9%
A.7×9% B.6×9% C.5×9% D.4×9% E.3×9%
A.腰椎正侧位X线片 B.肌电图 C.腰椎CT D.MRI E.腰椎X线平片