以下可发生渗出性RD的疾病有() ["A．原田病","B．葡萄膜炎","C．后巩膜炎","D．恶性高血压","E．Coats病"]
下列哪项可使散射线量增加() ["A．被照体面积大","B．被照体体积大","C．被照体厚度大","D．被照体含气量大","E．被照体组织密度均匀"]
常见的颅壁压迹有() ["A．导静脉压迹","B．脑回压迹","C．脑膜中动脉压迹","D．蛛网膜颗粒压迹","E．大脑中动脉"]
急性心肌梗死常见的死亡原因是() ["A．心源性休克","B．心力衰竭","C．严重心律失常","D．电解质紊乱","E．发热"]
详述几种常用于治疗痤疮的内用药。
试述痤疮的病因和发病机制。
