Graham-Steell杂音常见于()
A.三尖瓣狭窄
B.中、重度主动脉瓣关闭不全
C.二尖瓣关闭不全
D.二尖瓣狭窄伴明显肺动脉高压
E.扩张型心肌病
参考答案:D
任何单位不得在法定会计账簿之外私设会计账簿。
Tools and techniques of quality control include all of the following EXCEPT:
A.Flowchartin
B.Pareto char
C.Control chart
D.Estimates of control tendenc