22. — When did you last see your first teacher?

— On_____Friday last June, at_____celebration of her 40th year of teaching.

A．a; the

B．a; a

C．不填; the

D．不填; a

反映岩层有机质丰度的指标不包括（）。

A.石油类沥青含量

B.剩余有机碳含量

C.烃与有机质的比值

D.烃含量