Gina always asks_____, because her things are everywhere.
A:where are her keys
B:her keys are where
C:where her keys are
下图选项中,能反映唐代农业生产新技术的是( )
中国作为一个统一的多民族国家,民族交融,共同缔造中华民族的繁荣是一个永恒的话题。观察下列图片,回答问题:
材料一:
材料二:
材料三:
材料四:
①w= 35a22.4Vρ ×100%
②c= 1000a22.4V
③向上述溶液中再加入V mL水后,所得溶液的质量分数大于0.5w.