Wouldn't you feel rather________if you rushed to the airport to meet your friends only to find that they

had already been picked up by other people? [      ]

A. satisfied  

B. happy          

C. annoyed  

D. bored

在汽油发动机燃烧过程中，实际供给的空气质量与理论上完全燃烧时所需要的空气质量之比，称为（）。

A、空燃比

B、过量空气系数

C、混合气浓度

D、混合气供给量