B12
B12、B-12或B12可指:
- HLA-B12
- 12大联盟,Big 12 Conference
- B-10轟炸機的改进型号之一
- 卡罗-卡恩防御的ECO编号之一
- B-12,硼的同位素之一
- B12(α-硼),硼的同素异形体之一
- 维生素B12,维生素B12
A12 | ||
B11 | B12 | B13 |
C12 | ||
B12 | - | 12B |
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