被誉为“方书之祖”的医著是（）
A.《黄帝内经》
B.《伤寒杂病论》
C.《外台秘要》
D.《成方便读》
E.《医学源流论》
参考答案：B
With his work completed,the business man stepped back to his seat,feeling pleased he was a man of action.
A．which
B．that
C．what
D．whether
心脏黏液瘤，最常见于（）
A.右心房内
B.右心室内
C.左心房内
D.左心室内
E.心包腔内
