| Knowledge Item Name | contamination |
| Curve | Normal |
| Question/Answer | |
| Review Date | 2020/4/7 22:36:19 |
| Next Review Date | 2020/4/13 22:36:19 |
| Review Times | 5 |
| the act or process of contaminating or the state of being contaminated |
| Grade | Easy Factor | Review Date | Next Review Date | |
|---|---|---|---|---|
| 4 | 1.3 | 2020/4/7 22:36:19 | 2020/4/13 22:36:19 | |
| 4 | 1.3 | 2020/4/4 21:23:47 | 2020/4/5 21:23:47 |