| | 2020 | 11 21 7 2020 11 21 16 | | 2 | | | | | | | 11 | 21 1 | 4 | ︔ | | | A B | | | 2020 11 7 | | 24 ︵ | ︶ 7 | | | | | | | | | | | ︵ ︶ | ︵ ︶ | | | 24 | ︽ | ︾ | | | | ︵ ︶ | | | | | | | | | | | | | ︵ ︶ | | ︵ ︶ | | | | | | | | | | | | | | |