单项选择题
A.0.1ml B.0.15ml C.0.2ml D.0.25ml E.0.3ml
A.＜1mm B.1～1.5mm C.1.5～2mm D.2～2.5mm E.2.5～3mm
A.角膜 B.巩膜 C.葡萄膜 D.视网膜 E.巩膜和葡萄膜