A:Fe3O4
B:Fe4O5
C:Fe5O6
D:Fe5O7
①铭记历史,增强反日情绪 ②唤醒民族忧患意识
③确保所有学生牢记历史使命 ④正视历史,珍爱和平
——When is Day?——It's on June 1st, Dave.