Exa
2020-06-09T01:32:49+00:00
[img]https://img.nga.178.com/attachments/mon_202006/14/-vabhQ5-eqi8XlZ5xT3cS2tc-1eo.jpeg[/img]
我不明白为啥要选b？文中没说没开始研究啊[img]http://img.nga.178.com/attachments/mon_201209/14/-47218_5052bc587c6f9.png[/img][img]http://img.nga.178.com/attachments/mon_201209/14/-47218_5052bc587c6f9.png[/img]
我不明白为啥要选b？文中没说没开始研究啊[img]http://img.nga.178.com/attachments/mon_201209/14/-47218_5052bc587c6f9.png[/img][img]http://img.nga.178.com/attachments/mon_201209/14/-47218_5052bc587c6f9.png[/img]