单项选择题
The vegetations of infective endocarditis are found most frequently on
A.the aortic valves
B.the mitral valves
C.the tricuspid valves
D.the pulmonary valves
The vegetations of infective endocarditis are found most frequently on
A.the aortic valves
B.the mitral valves
C.the tricuspid valves
D.the pulmonary valves