昆虫飞行时翅膀要振动如蝴蝶飞行时翅膀每秒振动2 4次蜜蜂的翅膀每秒振动300 400次当它们都从你身后附近飞过时你仅凭听觉 A．能听到

昆虫飞行时翅膀要振动如蝴蝶飞行时翅膀每秒振动2 4次蜜蜂的翅膀每秒振动300 400次当它们都从你身后附近飞过时你仅凭听觉 A．能听到
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