第6题: [单项选择]Over the centuries, __________ that try to explain the origins of the university. A. although many theories B. many theories C. have many theories been D. there have been many theories 参考答案:D
第27题: [单项选择]关于胸部非螺旋扫描技术的描述,错误的是() A. 良恶性肿瘤鉴别及纵隔病变、大血管病变需平扫加增强扫描 B. 一般取仰卧位 C. 由肺尖至肺底连续扫描 D. 纵隔窗取窗位250~350HU E. 骨窗取窗宽1000~1500HU 参考答案:D 答案解析:胸部非螺旋扫描技术图像后处理,肺窗取窗宽1500~2000HU,窗位-450~-600HU,纵隔窗取窗宽250~350HU,窗位30~50HU,骨窗取窗宽1000~1500HU,窗位250~350HU