Back view of high school student solving math problem on whiteboard in classroom. Young man writing math solution on white board using marker. College guy solving math expression during lesson.
ID: 1821464747
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- 大图:6192 × 4128 像素·52.43 cm × 34.95 cm·300dpi·JPG
- 中图:1000 × 667 像素·35.28 cm × 23.53 cm·72dpi·JPG
- 小图:500 × 334 像素·17.64 cm × 11.78 cm·72dpi·JPG