眼球壁的解剖结构是 ["A.角膜、巩膜、脉络膜、视网膜","B.角膜、巩膜、玻璃体、视网膜","C.角膜、巩膜、晶状体、视网膜","D.角膜、巩膜、晶状体、玻璃体","E.玻璃体、巩膜、脉络膜、视网膜"]
正常成年人眼轴长为 ["A.18mm","B.20mm","C.22mm","D.24mm","E.26mm"]
新产品开发常用的预测方法是() ["外推法","因果法","直观法","计量模型预测法"]
请说明激光焊的特点及其适用场合。
皮样囊肿的内容包括: ①脂肪; ②毛发; ③钙质; ④牙齿 ["A.②+③+④","B.①+②+③","C.①+③+④","D.①+②+③+④","E.②"]
植物对盐分过多的适应能力称为()性。