膝关节骨关节病的原发病变是
A．透明软骨的退行性变
B．滑膜炎症
C．骨质增生
D．关节囊纤维变和增厚，关节挛缩
E．软骨下骨萎缩
参考答案：A
----Since you like the camera so much ,why not buy it?
-------Well , still I can not _____ such an expensive camera .I earn only $200 a month ,you know.
A need B adopt C share D afford
薄层色谱鉴别属于
A．物理鉴别法B．化学鉴别法C．光谱鉴别法D．色谱鉴别法E．微生物检定法
