第36题: [单项选择]正常的头颅侧位片符合标准的直接依据是 A. 额窦显示 B. 鼻骨显示 C. 蝶鞍各缘呈单线的半月状阴影,无双边影 D. 前颅凹底呈双线显示 E. 双侧乳突及外耳孔错位显示 参考答案:C 答案解析:标准的头颅侧位片上,要求蝶鞍各缘无双边征象,从而间接证明头颅的矢状面与胶片平行,中心线对准了蝶鞍的位置。
第37题: [填空题]How many groups can people be divided into They can be dividen into ______ groups. 参考答案:two (main) 答案解析:[听力原文] 11-15 People work for a number of reasons, and they can be divided into two main groups.