It was ________ very rare find and the archaeologist who made ________ discovery said it was like unearthly a Mona Lisa.

A．a; the

B．the; the

C．the; a

D．a; a

用于提供某一航班或从某一城市出发的所有控制航班上座位的出票与证实情况是（）指令。

A、FDL

B、FNL

C、FLR

D、FLP