男性，50岁。有动脉粥样硬化病史。突然感到剧烈刀割样胸痛2小时，向背部放射。查体发现主动脉瓣区可闻及舒张期杂音。考虑为主动脉夹层可能。下列哪一项是其常见的胸片表现() ["A．主动脉弓部和降主动脉上部影增宽","B．主动脉影狭小","C．主动脉影外形不规则","D．主动脉影位置改变","E．主动脉搏动增强"]
弥漫性血管内凝血(disseminatedintravascularcoagulationDIC)
女性，40岁。劳累后心悸、气促。体检：心尖区闻及舒张期隆隆样杂音。胸部正位摄片：心影呈梨形，中度增大。下列哪项是其典型的影像表现() ["A．单纯左心房增大","B．左心房，左心室增大","C．左心房、右心房增大","D．左心房、右心室增大","E．左心室、右心室增大"]
肺动脉狭窄最常见的类型是() ["A．瓣膜下型","B．瓣膜上型","C．瓣膜型","D．混合型","E．以上都不是"]
下述肺动脉狭窄(瓣膜型)的X线表现，错误的是() ["A．二尖瓣型心","B．肺动脉段突出","C．右心室增大","D．肺动脉段凹陷","E．肺血管纹理纤细"]
血友病甲()血友病乙()血友病丙()
