最常见的前部角膜营养不良是（）

A.Meesmann营养不良

B.地图-点状-指纹状营养不良

C.格子状营养不良

D.中央云雾状营养不良

E.大泡性角膜病变

FIATA is the largest ( ) in the field of transportation representing today．

A．international organization

B．non-government organization

C．Profit organizations

D．world trade organization