奶奶陪农学专业孙女上网课，老师提问的奶奶都会，网友:实践是检验真理的唯一标准
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| MP4 | N/A | 480P | Download |
| MP4 | N/A | 480P | Download |
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| MP4 | N/A | 360P | Download |
| MP4 | N/A | 360P | Download |
| MP4 | N/A | 360P | Download |
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| MP4 | N/A | mp4a.40.2 | Download |
| MP4 | N/A | mp4a.40.2 | Download |
| MP4 | N/A | mp4a.40.2 | Download |
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