喉部常规扫描，正确的屏气状态是 ["A．吸气后屏气扫描","B．呼气后屏气扫描","C．平静呼吸状态下扫描","D．发"依"情况下扫描","E．鼓气状态下扫描"]
副鼻窦CT扫描参数选择，错误的是 ["A．层厚5cm ","B．层距5cm ","C．采用小FOV ","D．观察薄骨有否破坏改用薄扫 ","E．薄扫时需降低条件"]
河流一般包括（）、（）、（）、下游和河口五段。
X线管围绕人体腹背轴（前后轴）旋转的扫描方式为 ["A．横断位扫描 ","B．冠状位扫描 ","C．矢状位扫描 ","D．正位定位扫描 ","E．侧位定位扫描"]
下列肺部叩诊不是浊音或实音的是（） ["肺炎","肺囊肿","肺不张","肺水肿","肺结核"]
水系的成因。
