耳是人体形成听觉的重要器官。遇到巨大声响时要迅速张口或闭嘴堵

耳是人体形成听觉的重要器官。遇到巨大声响时要迅速张口或闭嘴堵耳，这样做

A.有助减小惊吓 B.可以减弱声音

C.维持鼓膜两侧大气压的平衡 D.可以减少中耳的振动。

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耳是人体形成听觉的重要器官。遇到巨大声响时要迅速张口或闭嘴堵

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