| SHELL1 | | 简单 | 38.96% | |
| SHELL2 | | 简单 | 53.72% | |
| SHELL3 | | 中等 | 27.56% | |
| SHELL4 | | 中等 | 48.24% | |
| SHELL5 | | 中等 | 31.84% | |
| SHELL6 | | 中等 | 47.50% | |
| SHELL7 | | 较难 | 27.54% | |
| SHELL8 | | 较难 | 26.75% | |
| SHELL9 | | 较难 | 27.18% | |
| SHELL10 | | 较难 | 28.54% | |
| SHELL11 | | 较难 | 29.17% | |
| SHELL12 | | 较难 | 21.96% | |
| SHELL13 | | 中等 | 52.82% | |
| SHELL14 | | 较难 | 22.06% | |
| SHELL15 | | 较难 | 46.04% | |
| SHELL16 | | 较难 | 19.17% | |
| SHELL17 | | 中等 | 16.20% | |
| SHELL18 | | 中等 | 15.49% | |
| SHELL19 | | 中等 | 21.65% | |
| SHELL20 | | 中等 | 21.76% | |
| SHELL21 | | 中等 | 21.20% | |
| SHELL22 | | 中等 | 16.40% | |
| SHELL23 | | 中等 | 18.18% | |
| SHELL24 | | 简单 | 25.91% | |
| SHELL25 | | 简单 | 22.58% | |
| SHELL26 | | 中等 | 24.92% | |
| SHELL27 | | 中等 | 32.72% | |
| SHELL28 | | 中等 | 18.85% | |
| SHELL29 | | 中等 | 15.27% | |
| SHELL30 | | 中等 | 14.80% | |
| SHELL31 | | 较难 | 15.48% | |
| SHELL32 | | 较难 | 14.19% | |
| SHELL33 | | 中等 | 14.98% | |
| SHELL34 | | 中等 | 20.40% | |
