education high school university learning and people concept - teacher giving tests to students at lecture
ID: 1373359271
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- 大图:3973 × 2830 像素·33.64 cm × 23.96 cm·300dpi·JPG
- 中图:1000 × 712 像素·35.28 cm × 25.12 cm·72dpi·JPG
- 小图:500 × 356 像素·17.64 cm × 12.56 cm·72dpi·JPG