| | | | | | | | | | | | | | | | 250 400 | | | | | | | | | | | | | | B2 | C | | | | | ① | ② ③ | | ④ | | ⑤ | ⑥ | | ⑦ | | | ⑧ | 300-500 6 1 | | | | | | | | C | B | | | | | C | | | | | | | | | | | | | | | | 200-400 4 8 | | | | | | | | | | | | | | | |