第4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14题: [单项选择]{{I}} Questions 14 ~ 17 are based on a talk as to eating out.{{/I}}What does Peter think of Italian restaurants A. The food has too much oil. B. They serve too much. C. The food has too much-sauce, D. They serve little food. 参考答案:B 答案解析:[解析] 有关Italian food的论述Peter曾绎说过这样的话I love Italian food,but maybe we should skip that this time,They
第15题: [单项选择]室内外施工的环境温度,下列说法正确的是( )。 A. 高级抹灰不应低于0;中级、普通应在5度以上 B. 裱糊工程不低于5度 C. 刷涂清漆不应低于0度 D. 外墙砂浆温度不宜低于5度 参考答案:D 答案解析:[考点] 1A414061掌握墙面工程施工的技术要求和方法