| 分数范围 | 难易程度 |
| 0~30 | 很难(Very difficult) |
| 30~50 | 难(Difficult) |
| 50~60 | 较难(Fairly difficult) |
| 60~70 | 标准(Standard) |
| 70~80 | 较容易(Fairly easy) |
| 80~90 | 容易(Easy) |
| 90~100 | 很容易(Very easy) |