问题
问答题 简答题
什么叫磁共振血管造影？
答案
参考答案：
磁共振血管造影是利用MRI特殊的流动效应或相位改变而不同于动脉或静脉内注射造影剂再进行的血管造影，它是一种完全非损伤性血管造影的新技术。MRA的主要方法有两种：时间飞跃法（TOF.和相位对位法（PC.。
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什么叫磁共振血管造影？
参考答案：
磁共振血管造影是利用MRI特殊的流动效应或相位改变而不同于动脉或静脉内注射造影剂再进行的血管造影，它是一种完全非损伤性血管造影的新技术。MRA的主要方法有两种：时间飞跃法（TOF.和相位对位法（PC.。
In China, if people have a cold and they don’t think it’s serious, 小题1: There they can buy the medicine they need. They can also get some advice about their illnesses from the doctors and they are told what they should do. 小题2: If their illnesses are a little more serious. 小题3: Doctors usually ask about their trouble, check them over with equipments（仪器）and then give them a prescription（处方）. 小题4: they may have to stay in hospital. When people, especially（特别）the old or the babies, are badly ill, they can call 120 for help. the ambulance（救护车）can take them to the hospital as soon as possible. 小题5:
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