Film stars are so ____ to flash lamps that they don’t even notice them when they are interviewed.

A．associated

B．familiar

C．accustomed

D．devoted

患者，男性，左下后牙自发痛，冷、热痛3天。检查：左下6牙冠无明显龋坏，叩（+），松动Ⅱ度，近中牙周袋9mm，冷试验疼痛持续。该牙最可能的诊断是（）。

A.慢性牙髓炎

B.急性牙髓炎

C.逆行性牙髓炎

D.创伤

E.牙髓充血