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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.光的折射【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 502.82 MB | |
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15.透镜【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 377.06 MB | |
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16.生活中的透镜【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 411.06 MB | |
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17.凸透镜的成像规律【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 357.02 MB | |
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18.眼睛和眼镜【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 356.53 MB | |
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19.显微镜和望远镜【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 317.39 MB | |
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20.光的色散【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 423.77 MB | |
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21.看不见的光【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 349.58 MB | |
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22.热现象【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 376.52 MB | |
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23.温度计的使用【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 363.63 MB | |
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24.熔化和凝固【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 417.21 MB | |
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25.汽化和液化(1).mp4 | 2022-08-28 20:35:38 | 414.19 MB | |
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26.汽化和液化(2)【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 316.6 MB | |
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27.升华和凝华【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 305.89 MB | |
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28.质量(1)【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 458.16 MB | |
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29.质量(2)【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 266.48 MB | |
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30.密度(1).mp4 | 2022-08-28 20:35:38 | 276.22 MB | |
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31.密度(2)【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 478.49 MB | |
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32.测量物质的密度(1)【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 444.57 MB | |
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33.测量物质的密度(2)【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 345.68 MB | |
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34.密度与社会生活【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 337.24 MB | |
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35.力(1)【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 349.58 MB | |
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36.力(2)【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 336.78 MB | |
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37.弹力 弹簧测力计【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 340.24 MB | |
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38.重力【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 341.66 MB | |
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39.摩擦力(1)【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 398.88 MB | |
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40.摩擦力(2)【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 371.16 MB | |
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41.牛顿第一定律(1).mp4 | 2022-08-28 20:35:38 | 307.42 MB | |
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42.牛顿第一定律(2)【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 380.04 MB | |
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43.二力平衡【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 335.45 MB | |
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44.压强(1)【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 340.29 MB | |
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45.压强(2)【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 286.21 MB | |
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46.液体的压强(1)【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 345.92 MB | |
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47.液体的压强(2)【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 378.43 MB | |
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48.大气压强(1).mp4 | 2022-08-28 20:35:38 | 391.26 MB | |
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49.大气压强(2)【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 398.93 MB | |
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50.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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51.浮力(1).mp4 | 2022-08-28 20:35:38 | 381.9 MB | |
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52.浮力(2)【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 389.28 MB | |
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53.浮力(3)【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 355.33 MB | |
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54.浮力的应用【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 366.48 MB | |
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55.杠杆(1)【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 321.92 MB | |
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56.杠杆(2)【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 366.69 MB | |
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57.其它简单机械(1)【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 367.06 MB | |
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58.其它简单机械(2)【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 430.43 MB | |
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59.功和机械能【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 313.6 MB | |
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60.功率【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 202.22 MB | |
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61.机械效率(1)【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 246.72 MB | |
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62.机械效率(2)【~VX:582229】.mp4 | 2022-08-28 20:35:38 | 349.18 MB | |
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63.动能和势能【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 272.27 MB | |
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64.机械能及其转化【 ~VX:582229】.mp4 | 2022-08-28 20:35:38 | 257.19 MB |