education high school university learning and people concept - teacher giving tests to students at lecture
ID: 512039965
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- 大图:4334 × 2772 像素·36.69 cm × 23.47 cm·300dpi·JPG
- 中图:1000 × 640 像素·35.28 cm × 22.58 cm·72dpi·JPG
- 小图:500 × 320 像素·17.64 cm × 11.29 cm·72dpi·JPG