--- Jack, you look tired today. What’s wrong?

--- I was ____ busy ____ I didn’t go to bed until midnight yesterday.

A．too; to

B．so; that

C．enough; to

D．such; that

接收质量限AQL是允许生产方( )。

A．不合格率的最小值
B．过程平均的最小值
C．单批不合格率的最大值
D．平均不合格率的最大值