窝洞充填后立即产生咬合疼痛的原因是（）
A.可复性牙髓炎
B.有悬突
C.咬合高点
D.材料强度过高
E.充填材料未凝固
参考答案：C
感受听觉的部分是()
A.前庭
B.球囊
C.基底膜
D.半规管
E.椭圆囊
The school has very strict rules about cheating in exams, so no one can ______ it. [ ]
A. play a trick on
B. get the hang of
C. get away with
D. look forward to
