He got himself into a dangerous situation_____he was likely to lose control over the plane.    [    ]

A. where    

B. which    

C. while    

D.  that

额窦囊肿破坏额窦后壁时出现的特异性体征是（）

A.眼球向下移位

B.眼球突出

C.波特隆起

D.可触及与心率一致的搏动

E.Marcus-Gunn瞳孔