Don't be afraid of your failure in the exam.If you like,I'll give you a(n)__________ since I'm so good at

this.[ ]

A．opportunity  

B．choice

C．lesson  

D．hand

关节破坏的早期X线表现是（）

A.关节间隙增宽

B.关节间隙变窄

C.软骨下骨质破坏

D.骨端松质骨破坏

E.关节面糜烂