Beijing, the capital of China, is one of _____ cities in the world.[ ]

A. the biggest        

B. bigger

C. much bigger        

D. big

小半夏汤加用茯苓导水下行的依据是除呕吐主症外，原文还有

A．四肢肿

B．心悸

C．心下痞满

D．目眩

E．小便不利