若欲较好地显示血管狭窄，常采用() ["A．2D-TOF ","B．3D-TOF ","C．2D-PC ","D．3D-PC ","E．CE-MRA"]
何谓细胞周期非特异性药物?常用的有哪些?
低浓度顺磁性造影剂对质子弛豫时间的影响为() ["A．T1缩短，T2改变不大 ","B．T1缩短，T2延长 ","C．T1延长，T2缩短 ","D．T1缩短，T2缩短 ","E．T1延长，T2延长"]
试述氯喹治疗疟疾有何特点?
血流信号增加的影响因素为() ["A．偶数回波复相 ","B．舒张期假门控 ","C．流入性增强效应 ","D．以上均是 ","E．以上均不是"]
吡喹酮抗血吸虫病有何优点?为什么说它是一个广谱抗蠕虫药?
