education high school mathematics and people concept - student standing with remote control in front of teacher and classmates and showing mathematical equalities on white board in classroom
ID: 426325252
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- 大图:4436 × 2708 像素·37.56 cm × 22.93 cm·300dpi·JPG
- 中图:1000 × 610 像素·35.28 cm × 21.52 cm·72dpi·JPG
- 小图:500 × 305 像素·17.64 cm × 10.76 cm·72dpi·JPG