外耳孔与同侧眼眶下缘的连线称为 ["A．听眦线","B．听眶线","C．听鼻线","D．听口线","E．瞳间线"]
波浪的折射
通常照片铅字标记应置于暗盒边缘内 ["A．0．5cm处","B．1．0cm处","C．1．5cm处","D．3cm处","E．5cm处"]
X线自被照体的前面投向后面称为 ["A．前后方向投射","B．后前方向投射","C．冠状方向投射","D．轴方向投射","E．切线方向投射"]
居住、文教机关为主的区域适用于《城市区域环境噪声标准》（GB3096-2008）规定的哪一类类标准？（） ["A、0类","B、1类","C、2类","D、3类"]
潮流
