| 文件 | 时间 | 大小 | 下载 | |
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01.长度、时间及其测量（1）...mp4 | 2024-07-01 17:57:55 | 430.27 MB | |
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02.长度、时间及其测量（2）...mp4 | 2024-07-01 17:57:55 | 223.42 MB | |
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03.运动的描述...mp4 | 2024-07-01 17:57:55 | 317.89 MB | |
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04.运动的快慢...mp4 | 2024-07-01 17:57:55 | 378.26 MB | |
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05.声音的产生与传播...mp4 | 2024-07-01 17:57:55 | 256.62 MB | |
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06.我们怎样听到声音...mp4 | 2024-07-01 17:57:55 | 340.51 MB | |
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07.声音的特征...mp4 | 2024-07-01 17:57:55 | 310.47 MB | |
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08.噪声的危害和控制...mp4 | 2024-07-01 17:57:55 | 319.44 MB | |
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09.声音的利用...mp4 | 2024-07-01 17:57:55 | 331.8 MB | |
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10.光现象...mp4 | 2024-07-01 17:57:55 | 365.01 MB | |
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11.光的直线传播的现象与应用...mp4 | 2024-07-01 17:57:55 | 385.29 MB | |
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12.光的反射...mp4 | 2024-07-01 17:57:55 | 373.55 MB | |
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13.平面镜成像...mp4 | 2024-07-01 17:57:55 | 412.45 MB | |
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14.光的折射...mp4 | 2024-07-01 17:57:55 | 502.82 MB | |
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15.透镜...mp4 | 2024-07-01 17:57:55 | 377.06 MB | |
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16.生活中的透镜...mp4 | 2024-07-01 17:57:55 | 411.06 MB | |
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17.凸透镜的成像规律...mp4 | 2024-07-01 17:57:55 | 357.02 MB | |
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18.眼睛和眼镜...mp4 | 2024-07-01 17:57:55 | 356.53 MB | |
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19.显微镜和望远镜...mp4 | 2024-07-01 17:57:55 | 317.39 MB | |
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20.光的色散...mp4 | 2024-07-01 17:57:55 | 423.77 MB | |
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21.看不见的光...mp4 | 2024-07-01 17:57:55 | 349.58 MB | |
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22.热现象...mp4 | 2024-07-01 17:57:55 | 376.52 MB | |
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23.温度计的使用...mp4 | 2024-07-01 17:57:55 | 363.63 MB | |
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24.熔化和凝固...mp4 | 2024-07-01 17:57:55 | 417.21 MB | |
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25.汽化和液化（1）...mp4 | 2024-07-01 17:57:55 | 414.19 MB | |
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26.汽化和液化（2）...mp4 | 2024-07-01 17:57:55 | 316.6 MB | |
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27.升华和凝华...mp4 | 2024-07-01 17:57:55 | 305.89 MB | |
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28.质量（1）...mp4 | 2024-07-01 17:57:55 | 458.16 MB | |
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29.质量（2）...mp4 | 2024-07-01 17:57:55 | 266.48 MB | |
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30.密度（1）...mp4 | 2024-07-01 17:57:55 | 276.22 MB | |
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31.密度（2）...mp4 | 2024-07-01 17:57:55 | 478.49 MB | |
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32.测量物质的密度（1）...mp4 | 2024-07-01 17:57:55 | 444.57 MB | |
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33.测量物质的密度（2）...mp4 | 2024-07-01 17:57:55 | 345.68 MB | |
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34.密度与社会生活...mp4 | 2024-07-01 17:57:55 | 337.24 MB | |
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35.力（1）...mp4 | 2024-07-01 17:57:55 | 349.58 MB | |
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36.力（2）...mp4 | 2024-07-01 17:57:55 | 336.78 MB | |
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37.弹力 弹簧测力计...mp4 | 2024-07-01 17:57:55 | 340.24 MB | |
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38.重力...mp4 | 2024-07-01 17:57:55 | 341.66 MB | |
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39.摩擦力（1）...mp4 | 2024-07-01 17:57:55 | 398.88 MB | |
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40.摩擦力（2）...mp4 | 2024-07-01 17:57:55 | 371.16 MB | |
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41.牛顿第一定律（1）...mp4 | 2024-07-01 17:57:55 | 307.42 MB | |
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42.牛顿第一定律（2）...mp4 | 2024-07-01 17:57:55 | 380.04 MB | |
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43.二力平衡...mp4 | 2024-07-01 17:57:55 | 335.45 MB | |
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44.压强（1）...mp4 | 2024-07-01 17:57:55 | 340.29 MB | |
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45.压强（2）...mp4 | 2024-07-01 17:57:55 | 286.21 MB | |
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46.液体的压强（1）...mp4 | 2024-07-01 17:57:55 | 345.92 MB | |
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47.液体的压强（2）...mp4 | 2024-07-01 17:57:55 | 378.43 MB | |
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48.大气压强（1）...mp4 | 2024-07-01 17:57:55 | 391.26 MB | |
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49.大气压强（2）...mp4 | 2024-07-01 17:57:55 | 398.93 MB | |
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50.流体压强与流速的关系...mp4 | 2024-07-01 17:57:55 | 376.59 MB | |
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51.浮力（1）...mp4 | 2024-07-01 17:57:55 | 381.9 MB | |
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52.浮力（2）...mp4 | 2024-07-01 17:57:55 | 389.28 MB | |
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53.浮力（3）...mp4 | 2024-07-01 17:57:55 | 355.33 MB | |
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54.浮力的应用...mp4 | 2024-07-01 17:57:55 | 366.48 MB | |
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55.杠杆（1）...mp4 | 2024-07-01 17:57:55 | 321.92 MB | |
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56.杠杆（2）...mp4 | 2024-07-01 17:57:55 | 366.69 MB | |
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57.其它简单机械（1）...mp4 | 2024-07-01 17:57:55 | 367.06 MB | |
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58.其它简单机械（2）...mp4 | 2024-07-01 17:57:55 | 430.43 MB | |
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59.功和机械能...mp4 | 2024-07-01 17:57:55 | 313.6 MB | |
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60.功率...mp4 | 2024-07-01 17:57:55 | 202.22 MB | |
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61.机械效率（1）...mp4 | 2024-07-01 17:57:55 | 246.72 MB | |
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62.机械效率（2）...mp4 | 2024-07-01 17:57:55 | 349.18 MB | |
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63.动能和势能...mp4 | 2024-07-01 17:57:55 | 272.27 MB | |
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64.机械能及其转化...mp4 | 2024-07-01 17:57:55 | 257.19 MB |