以下是关于【声音在不同介质】的公开课/优质课视频，一共179个
1:01:4486-
43:4368 -
46:56139 -
30:5037 -
43:5763 -
38:12104 -
43:4672 -
39:3469 -
43:1314 -
34:4195 -
40:1258 -
36:2021 -
20:5554 -
49:28120 -
06:3812 -
06:0083 -
27:1450 -
29:0918 -
06:59135 -
04:51140 -
06:2633 -
05:3035 -
03:3559 -
45:2467 -
1:01:02107 -
03:1798 -
58:1326 -
40:0940 -
38:0348 -
06:0072 -
35:24118 -
39:4389 -
47:5123 -
44:4622 -
43:43139 -
1:06:0651 -
45:2740 -
07:2219 -
39:3534 -
41:3253 -
43:57135 -
35:2126 -
50:17116 -
1:01:4463 -
1:06:12108 -
35:2443 -
39:2340 -
36:205 -
40:1436 -
18:4562 -
33:1715 -
52:2180 -
43:1174 -
17:03112 -
1:01:0257 -
1:03:42117 -
1:04:4225 -
52:3016 -
21:54114 -
55:0525 -
38:0350 -
17:4668 -
52:2041 -
42:2279 -
1:03:42132 -
45:1754 -
30:50133 -
34:53114 -
28:5391 -
48:3177 -
42:24114 -
40:4942 -
53:03109 -
30:0583 -
39:4425 -
43:45114 -
44:37131 -
34:4130 -
1:06:5052 -
52:30113 -
48:5594 -
24:4614 -
25:0680 -
46:4334 -
35:02136 -
48:56100 -
42:55126 -
37:49109 -
1:06:12140 -
21:56105 -
21:5671 -
44:5919 -
43:1092 -
05:5066 -
43:1033 -
47:5128 -
37:4359 -
40:0394 -
42:5233 -
44:38111