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01.长度、时间及其测量(1)【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 430.27 MB | |
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02.长度、时间及其测量(2)【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 223.42 MB | |
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03.运动的描述【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 317.89 MB | |
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04.运动的快慢【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 378.26 MB | |
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05.声音的产生与传播【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 256.62 MB | |
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06.我们怎样听到声音【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 340.51 MB | |
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07.声音的特征【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 310.47 MB | |
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08.噪声的危害和控制【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 319.44 MB | |
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09.声音的利用【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 331.8 MB | |
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10.光现象【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 365.01 MB | |
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11.光的直线传播的现象与应用【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 385.29 MB | |
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12.光的反射【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 373.55 MB | |
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13.平面镜成像【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 412.45 MB | |
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14.球面镜【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 389.29 MB | |
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15.光的折射【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 502.82 MB | |
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16.光的色散【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 423.77 MB | |
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17.看不见的光【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 349.58 MB | |
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18.透镜【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 377.06 MB | |
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19.生活中的透镜【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 411.06 MB | |
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20.凸透镜的成像规律【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 357.02 MB | |
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21.眼睛和眼镜【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 356.53 MB | |
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22.显微镜和望远镜【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 317.39 MB | |
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23.质量(1)【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 458.16 MB | |
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24.质量(2)【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 266.48 MB | |
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25.密度(1).mp4 | 2022-08-28 20:35:38 | 276.22 MB | |
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26.密度(2)【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 478.49 MB | |
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27.测量物质的密度(1)【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 444.57 MB | |
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28.测量物质的密度(2)【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 345.68 MB | |
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29.密度与社会生活【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 337.24 MB | |
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30.力(1)【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 349.58 MB | |
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31.力(2)【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 336.78 MB | |
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32.弹力 弹簧测力计【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 340.24 MB | |
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33.重力【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 341.66 MB | |
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34.摩擦力(1).mp4 | 2022-08-28 20:35:38 | 398.88 MB | |
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35.摩擦力(2)【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 371.16 MB | |
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36.牛顿第一定律(1)【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 307.42 MB | |
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37.牛顿第一定律(2)【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 380.04 MB | |
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38.二力平衡【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 335.45 MB | |
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39.压强(1)【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 340.29 MB | |
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40.压强(2)【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 286.21 MB | |
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41.液体的压强(1)【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 345.92 MB | |
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42.液体的压强(2)【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 378.43 MB | |
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43.大气压强(1).mp4 | 2022-08-28 20:35:38 | 391.26 MB | |
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44.大气压强(2)【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 398.93 MB | |
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45.流体压强与流速的关系【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 376.59 MB | |
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46.浮力(一)【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 219.71 MB | |
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47.浮力(二)【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 197.67 MB | |
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48.浮力(三)【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 165.28 MB | |
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49.浮力的应用【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 183.58 MB | |
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50.杠杆(1)【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 321.92 MB | |
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51.杠杆(2)【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 366.69 MB | |
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52.滑轮(一)【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 179.94 MB | |
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53.滑轮(二)【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 160.37 MB | |
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54.功和机械能【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 313.6 MB | |
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55.功率【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 202.22 MB | |
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56.功的原理【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 209.71 MB | |
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57.机械效率(1).mp4 | 2022-08-28 20:35:38 | 246.72 MB | |
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58.机械效率(2)【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 349.18 MB | |
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59.动能和势能【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 272.27 MB | |
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60.机械能及其转化【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 257.19 MB |