下列正常心脏传导系统哪一部分传导最缓慢()。
A.房室结
B.结间束
C.左右束支
D.浦肯野纤维
E.希氏束
参考答案:A
Positive attitudes can not only _______ one's confidence but also improve the quality of life. [ ]
A. speed up
B. build up
C. take up
D. sweep up
吴茱萸汤中用的姜是()
A.生姜
B.炮姜
C.干姜
D.煨姜
E.良姜