| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 1. | | | | | | | | | | | | | | | | | | 2. | | ① | | 2020 | 260 \ | | | | ② | | | | ③ 9 2 | | | ④ | | | | | | 3 | | | | | | | 4 | | | | | | 2 1 | | | | | | | | | | | | 1. | | 18 | | | 2. | | | | | | 3 | 50% | | | 4 | | | 15% 95% | | | 5 | | 1000 | 2500 | 300 | | 6 | | | | | 1 9 | | | | | | | | | | | | | 20% | 20% | | 7. ① | | | ② | | | ③ | | | | | | 8 | | | | | | | | | | | | | | | | | | | |