图 4.
Cell activity detection of each group at different time points
培养各时间点各组支架内细胞活性检测（荧光显微镜×100）
从左至右依次为培养后 1、7、14 d a. A 组；b. B 组；c. C 组
From left to right for cultured for 1, 7, and 14 days respectively a. Group A; b. Group B; c. Group C
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