[초등 과학 3-2] 5. 소리의 성질 - 5차시. 소리는 무엇을 통해 전달될까요?

[초등 과학 3-2] 5. 소리의 성질 - 5차시. 소리는 무엇을 통해 전달될까요?

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[초등 과학 3-2] 5. 소리의 성질 - 5차시. 소리는 무엇을 통해 전달될까요? 3:36
[초등 과학 3-2] 5. 소리의 성질 - 5차시. 소리는 무엇을 통해 전달될까요? 클래스로그
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