春鄂教科学四下第20课《不同的声音》

不同的声音（鄂教版）四年级科学下册课件/p/10d33e085485/p/e3535642ef31/p/759f00959436/p/922d044c2146/p/30e6cfc27230/p/6efc158aa3c4/p/454d5249ccb1/p/2af3ea72da73/p/8c1c1a0ad586/p/bb8b369ebe57/p/c5ce0ac3d0d5/p/411bb39696b0/p/f7bc017efe6f/p/a60a16e8f5c8/p/fc061b286172/p/338370bc62ba/p/29905261bf34/p/e9e30ec291a9/p/7383ba08f060/p/8df6a9e6c436/p/95ae899d8510/p/d5ad50671166/p/075627258410/p/a8acb13bb094/p/6dfb52e9bbe1/p/3fcf6cfd8955/p/5320f8864e86/p/491e534b0cf5/p/a2b38ded1f9e/p/137561a70de9/p/b7461060d159/p/7bfa6a396e3a/p/46ca2ecf422f/p/cc2de752b066/p/0a7152c29543/p/9cfa077e24d0/p/305e0690556e/p/ab9ed897a175/p/09009db96237/p/909066c5e501/p/c85513a6a058/p/5a26feb1c61c/p/51329ceff75d/p/9a559c97fa54/p/afa4385fd19b/p/cae5dfd2e45f/p/8307c0f63249/p/da82eac55a78/p/72a0a73b7c02/p/a7b91f59b8cb/p/cc343100d6a7/p/7c6b761f54a8/p/b9a900e7130a/p/7db785d552b3/p/3d758f36a166/p/7d04db2468c9/p/5e17e3cf0160/p/e661d58cf5e8/p/6ab6eb8f6b5e/p/4ef012b658bc/p/2e7c71b22891/p/b912f06b2aa4/p/22f50256096a/p/771b14db8c37/p/8c2f4af7e21c/p/b80ee919ec86/p/18c36c105adf/p/7938046dfe59/p/2007a420e0f4/p/8f6aa81306fa/p/de804aa02dbd/p/84fd3b230957/p/39ef1da6a10f/p/a1919f84d122/p/87fa1a2f993a/p/026cb833b882/p/43a7801447d2/p/a7c2901bc4c6/p/6acf553597c2/p/ebf6e582da08/p/8f3f4279e63a/p/2910013b1b3f/p/c6d6522adbb1/p/d69a032d4bf7/p/09eff4a4bcb7/p/ac002f46c5ed/p/51fb40fc3738/p/43211ac0256d/p/1bee08485f32/p/70676d2d0573/p/d5c6f183c1b5/p/f4edfae7c9f7/p/10bdf2a9f798/p/831b6d010bc7/p/7e6144619b29/p/7e026310a840/p/5ccdc379675b/p/a6392b6c81df/p/655c37a3c7df/p/82933f0a33411整理课件我们生活的世界充满了各种声音

2整理课件3整理课件声音的高低、强弱，以及音色的不同形成各种各样的声音。4整理课件有些声音让我们心情愉悦，但也有一些声音听了让人不舒服。说说日常生活中，哪些声音会让我们感觉到不舒服？

5整理课件噪音噪音是指太大的声音。那些干扰我们听觉的声音、令人不愉快、使人身心不舒服的声音都是噪音。

6整