霍乱里和而表未解,表现为“吐利止而身疼痛不休者”,宜下列何汤“小和之”?()
A.小柴胡汤
B.柴胡桂枝汤
C.桂枝汤
D.桂枝人参汤
E.小建中汤
参考答案:C
David is a musician and he can play the piano very . [ ]
A. good; good
B. well; well
C. good; well
D. well; good
多级放大器有那几种耦合方式?各有什么特点?