【简答题】眼球的结构与功能: (无色透明,可透光) 虹膜(中央是 ) 瞳孔( ) 晶状体(凸透镜、折射光) 玻璃体 视网膜 脉络膜 (保护作用) 视网膜
【单选题】—What happened to him? —He _______ by a car. [ ]
【判断题】建筑工地临时供水主要包括:生产用水、生活用水和消防用水。
【单选题】The boy was lucky that he just missed ____ by the car. A. hitting B. to be hit C. being hit D. to hit
【单选题】光动力疗法治疗脉络膜新生血管利用的机制是