1 / 8

回声是发生在山谷中的一种自然现象,当我们向山谷发出声音,声音传到山谷中的物体上时,被反射回来形成了回声。比我们的声音要弱,而且是渐渐消失的。

回声. 回声是发生在山谷中的一种自然现象,当我们向山谷发出声音,声音传到山谷中的物体上时,被反射回来形成了回声。比我们的声音要弱,而且是渐渐消失的。. f. 强. p. 弱. 你好吗 — 你好吗 — 你好吗 — f p pp. 我们交个朋友吧 —— 我们交个朋友吧 —— f pp. I. I. i 6 0 i 6 0. __. __. __. __. 噢 噢. f pp. I. I.

ilar
Download Presentation

回声是发生在山谷中的一种自然现象,当我们向山谷发出声音,声音传到山谷中的物体上时,被反射回来形成了回声。比我们的声音要弱,而且是渐渐消失的。

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. 回声 • 回声是发生在山谷中的一种自然现象,当我们向山谷发出声音,声音传到山谷中的物体上时,被反射回来形成了回声。比我们的声音要弱,而且是渐渐消失的。

  2. f 强 p 弱

  3. 你好吗— 你好吗— 你好吗— f p pp

  4. 我们交个朋友吧—— 我们交个朋友吧—— f pp

  5. I I i 6 0 i 6 0 __ __ __ __ 噢 噢 f pp I I 7 5 0 7 5 0 __ __ __ __ 噢 噢

  6. 友谊的回声

More Related