最易发生心肌离心性肥大的疾病是（）。
A.高血压病
B.主动脉瓣关闭不全
C.主动脉瓣狭窄
D.肺动脉高压
E.肺动脉狭窄
参考答案：B
I saw a woman _____ against the wall ____ tired and stressed and as though she'd been crying. [ ]
A. leaning up；looking
B. lean up; look
C. leaned up; looked
D. was leaning up; was looking
在BSP方法中常出现的所谓C/U矩阵，它所反映的联系是
A．过程/组织
B．过程/数据类
C．过程/系统
D．过程/资源
