ультразвук и инфразвук для 9 класса. 9Б. Си.
звук не мой, в начале есть отсылка на оригинал, его можно найти в открытом доступе.
4 months ago 00:14:20 1
4 months ago 00:21:04 1
4 months ago 00:15:06 1
4 months ago 00:32:23 1
4 months ago 00:37:20 1
4 months ago 00:04:33 2
4 months ago 00:00:00 1
4 months ago 00:28:59 1
4 months ago 00:05:12 5
4 months ago 00:03:29 1
4 months ago 00:00:00 1
4 months ago 00:12:01 1
4 months ago 00:04:01 7
4 months ago 00:00:00 1
4 months ago 00:17:04 1
4 months ago 00:00:00 1
4 months ago 00:04:18 7
4 months ago 00:13:50 5
4 months ago 00:00:00 1
4 months ago 00:00:00 1
4 months ago 00:11:42 1
4 months ago 00:06:44 1
4 months ago 00:02:27 1
4 months ago 00:00:19 1
