先天性脊柱侧弯最关键的诊断依据是()
A.MRI见脊髓空洞
B.B超检查有椎旁软组织厚度改变
C.X线片见半椎体
D.X线片见脊柱弯曲
E.MRI见脊髓受压
参考答案:C
国家质检总局对向我国输出贸易性栽培介质的国外生产、加工、存放单位实行注册登记制度。 ( )
They are too _________for me. I prefer the plain ones. [ ]
A. ordinary
B. fancy
C.imaginary
D. common