bonjour, pouvez-nous nous aider s'il vous plaît? merci.... Pergunta de ideia decatherine1234

catherine1234 @catherine1234

June 2021 1 220 Report

bonjour, pouvez-nous nous aider s'il vous plaît? merci

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UnePersonne324

Réponse:

A) 20-20000 hz

B) infrason: inferieur a 20 hz et ultrasons :supérieur a 20000hz

C)infrason : elephant

Ultrason :chats, chauve souris, chien, dauphin

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UnePersonne324 developpe les réponses que je t'ai donné

catherine1234 merci beaucoup ! :)

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