— Do you think an advertisement is ____ help when you look for a new job?

— Well, it all depends. Anyway, it gives me more of ____ chance to try.

A．a; a

B．the; the

C．a; the

D．/; /

大气逆温主要有哪几种形式（）。

A.气候型逆温

B.辐射逆温

C.下沉逆温

D.高山逆温

E.地形逆温