虹膜炎继发性青光眼是由于( )
A.虹膜周边前粘连、瞳孔闭锁
B.房水分泌过多
C.血—房水屏障功能破坏
D.玻璃体大量炎症细胞
E.炎症反复发作使房角后退
参考答案:A
The little girl sat at the door with her legs ___ and kept her eyes ___at the planes flying in the sky.
A.crossed; looking
B.crossing; looking
C.crossed; looked
D.crossing; looked
酸蚀剂对牙髓的刺激大小与下列因素有关,除外()
A.酸的强度
B.酸蚀的时间
C.剩余牙本质的厚度
D.牙齿的矿化程度
E.酸蚀涂布的压力