第17题: [单项选择]常用于慢流静脉及静脉窦成像的技术是() A. 3D-TOF-MRA B. 2D-CE-MRA C. 2D-PC-MRA D. 3D-PC-MRA E. 3D-CE-MRA 参考答案:C 答案解析:2D-PC-MRA常用于慢流静脉及静脉窦成像,由于2D-PC-MRA能够准确反映流动自旋的流速和方向,结合ECG同步技术,常用于流体的流量分析。3D-PC-MRA的流动背景抑制较好,但其采集时间较TO
第18题: [单项选择]血小板低于下列哪个值时,临床应警惕自发性出血倾向( )。 A. 100×109/L B. 80×109/L C. 60×109/L D. 40×109/L E. 20×109/L 参考答案:E 答案解析:[知识点] 血液病常见症状的护理要点
第21题: [单项选择]{{B}}Questions 11 to 18 are based on the conversation you have just heard.{{/B}} A. To keep the space. B. To get into the auditorium. C. To give up the room. D. To reserve the room. 参考答案:D 答案解析:[听力原文]
M: Do you know if Sarah has reserved the room for the committee meeting yet
W: No. But if