---What do you think of Mrs. Smith?  

---She is ______ as you could ever meet.

A．an as kind lady

B．as a kind lady

C．as kind a lady

D．kind as a lady

病人因病遭受的痛苦、悲伤、抑郁等难以用货币确切表达的成本为

A．直接成本
B．无形成本
C．机会成本
D．边际成本
E．有形成本