心肌灌注断层显像常见的伪影原因有（）
A. * *
B.病人位置移动
C.肝脏放射性太浓
D.膈肌
E.体外异物
参考答案：A, B, C, D, E
2. He has lived _____ for many years. That's why he can hardly speak his mother tongue now.
A．in abroad
B．exotic
C．foreign
D．Abroad
关于“戏剧性”的学说包括：（）；（），激变说，情境说。
