答案:A
The maxillary sinuses open into ().
A.the nasal vestibule
B.the sphenoethmoidal recess
C.the superior nasal meatus
D.the middle nasal meatus
E.the inferior nasal meatus
旅客坐车时闭上眼睛也能判断汽车速度的变化和上下坡行驶,接受这种刺激的感受器位于
A.鼓室和半规管
B.前庭和半规管
C.前庭和耳蜗
D.鼓室和耳蜗