血液循环依赖于下列哪些脏器的生理功能正常
A．心
B．肝
C．肺
D．脾
参考答案：A,B,C,D
It is human nature to think back to a golden age _____ one's country was strong and respected. [ ]
A. if
B. when
C. while
D. after
ST段抬高性心肌梗死心电图在Ⅱ、Ⅲ、avF导联有改变，其定位诊断是（）
A.前壁
B.前间壁
C.下壁
D.后壁
E.侧壁
