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

防止慢车状态电嘴洁污的一般做法是在慢车时将混合比操纵杆置于（）调节气门止动钉到（）的慢车转速.

A.最贫油位，最大

B.最贫油位，最小

C.最富油位，最大

D.最富油位，最小