In order to find      better job, he decided to study     second foreign language.

A．the; a

B．a; a

C．the; the

D．a; the

培养空肠弯曲菌

A．需氧培养
B．二氧化碳培养
C．庖肉培养
D．微需氧培养
E．厌氧罐培养