— Good morning, Sir. You were looking for me just now?

— Yes. I _________ have a talk with you. Will you come to my office now?

A．had better

B．would rather

C．may as well

D．would like to

各种有害物质在大气中容许存在的限量浓度，称为

A．最低限量浓度

B．最高有害浓度

C．最高容许浓度

D．最低安全浓度

E．最低有害浓度