| 文件 | 时间 | 大小 | 下载 | |
|---|---|---|---|---|
|
|
01_九年级上册体验课《物质的转化（一）》.mp4 | 2025-07-27 03:05:15 | 18.4 MB | |
|
|
02_1.1物质的变化.mp4 | 2025-07-27 03:05:17 | 14.75 MB | |
|
|
03_1.2物质的酸碱性（一）.mp4 | 2025-07-27 03:05:17 | 8.7 MB | |
|
|
04_1.2物质的酸碱性（二）.mp4 | 2025-07-27 03:05:17 | 12.61 MB | |
|
|
05_1.3常见的酸.mp4 | 2025-07-27 03:05:18 | 15.8 MB | |
|
|
06_1.4常见的碱.mp4 | 2025-07-27 03:05:18 | 10.71 MB | |
|
|
07_1.5酸和碱之间发生的反应.mp4 | 2025-07-27 03:05:18 | 9.64 MB | |
|
|
08_1.6几种重要的盐（一）.mp4 | 2025-07-27 03:05:18 | 10.01 MB | |
|
|
09_1.6几种重要的盐（二）.mp4 | 2025-07-27 03:05:18 | 12.6 MB | |
|
|
10_1.6几种重要的盐（三）.mp4 | 2025-07-27 03:05:19 | 8.95 MB | |
|
|
11_1.6几种重要的盐（四）.mp4 | 2025-07-27 03:05:19 | 10.17 MB | |
|
|
12_1.6几种重要的盐（五）.mp4 | 2025-07-27 03:05:19 | 14.1 MB | |
|
|
13_1.6几种重要的盐（六）.mp4 | 2025-07-27 03:05:19 | 15.2 MB | |
|
|
14_2.1金属材料（一）.mp4 | 2025-07-27 03:05:19 | 13.22 MB | |
|
|
15_2.1金属材料（二）.mp4 | 2025-07-27 03:05:20 | 9.6 MB | |
|
|
16_2.2金属的化学性质.mp4 | 2025-07-27 03:05:20 | 40.5 MB | |
|
|
17_2.3有机物和有机合成材料（一）.mp4 | 2025-07-27 03:05:20 | 12.99 MB | |
|
|
18_2.3有机物和有机合成材料（二）.mp4 | 2025-07-27 03:05:20 | 15.26 MB | |
|
|
19_2.4物质的分类.mp4 | 2025-07-27 03:05:20 | 9.25 MB | |
|
|
20_2.5物质的转化（一）.mp4 | 2025-07-27 03:05:20 | 18.4 MB | |
|
|
21_2.5物质的转化（二）.mp4 | 2025-07-27 03:05:21 | 9.06 MB | |
|
|
22_2.5物质的转化（三）.mp4 | 2025-07-27 03:05:22 | 10.75 MB | |
|
|
23_2.5物质的转化（四）.mp4 | 2025-07-27 03:05:23 | 12.1 MB | |
|
|
24_2.6材料的利用与发展.mp4 | 2025-07-27 03:05:23 | 8.7 MB | |
|
|
25_3.1能量及其形式.mp4 | 2025-07-27 03:05:23 | 19.66 MB | |
|
|
26_3.2机械能（一）.mp4 | 2025-07-27 03:05:23 | 19.11 MB | |
|
|
27_3.2机械能（二）.mp4 | 2025-07-27 03:05:23 | 16.8 MB | |
|
|
28_3.3能量转化的量度（一）.mp4 | 2025-07-27 03:05:24 | 20.74 MB | |
|
|
29_3.3能量转化的量度（二）.mp4 | 2025-07-27 03:05:24 | 15.76 MB | |
|
|
30_3.4简单机械（一）.mp4 | 2025-07-27 03:05:24 | 30.11 MB | |
|
|
31_3.4简单机械（二）.mp4 | 2025-07-27 03:05:24 | 18.35 MB | |
|
|
32_3.4简单机械（三）.mp4 | 2025-07-27 03:05:24 | 16.15 MB | |
|
|
33_3.5物体的内能（一）.mp4 | 2025-07-27 03:05:25 | 11.25 MB | |
|
|
34_3.5物体的内能（二）.mp4 | 2025-07-27 03:05:25 | 15.38 MB | |
|
|
35_3.5物体的内能（三）.mp4 | 2025-07-27 03:05:25 | 13.17 MB | |
|
|
36_3.5物体的内能（四）.mp4 | 2025-07-27 03:05:25 | 11.36 MB | |
|
|
37_3.5物体的内能（五）.mp4 | 2025-07-27 03:05:26 | 14.39 MB | |
|
|
38_3.6电能（一）.mp4 | 2025-07-27 03:05:26 | 17.35 MB | |
|
|
39_3.6电能（二）.mp4 | 2025-07-27 03:05:26 | 12.17 MB | |
|
|
40_3.6电能（三）.mp4 | 2025-07-27 03:05:26 | 6.79 MB | |
|
|
41_3.6电能（四）.mp4 | 2025-07-27 03:05:26 | 11.29 MB | |
|
|
42_3.7核能.mp4 | 2025-07-27 03:05:28 | 8.79 MB | |
|
|
43_3.8能量的转化与守恒（一）.mp4 | 2025-07-27 03:05:28 | 9.8 MB | |
|
|
44_3.8能量的转化与守恒（二）.mp4 | 2025-07-27 03:05:28 | 10.26 MB | |
|
|
45_4.1食物与营养（一）.mp4 | 2025-07-27 03:05:29 | 17.19 MB | |
|
|
46_4.1食物与营养（二）.mp4 | 2025-07-27 03:05:29 | 31.11 MB | |
|
|
47_4.2食物的消化与吸收.mp4 | 2025-07-27 03:05:29 | 34.76 MB | |
|
|
48_4.3体内物质的运输（一）.mp4 | 2025-07-27 03:05:29 | 28.41 MB | |
|
|
49_4.3体内物质的运输（二）.mp4 | 2025-07-27 03:05:30 | 29.75 MB | |
|
|
50_4.3体内物质的运输（三）.mp4 | 2025-07-27 03:05:30 | 44.35 MB | |
|
|
51_4.3体内物质的运输（四）.mp4 | 2025-07-27 03:05:30 | 30.77 MB | |
|
|
52_4.4能量的获得.mp4 | 2025-07-27 03:05:30 | 22.11 MB | |
|
|
53_4.5体内物质的动态平衡（一）.mp4 | 2025-07-27 03:05:30 | 24.78 MB | |
|
|
54_4.5体内物质的动态平衡（二）.mp4 | 2025-07-27 03:05:31 | 18.27 MB |