—How was your National Day vacation?

—Great! We went sightseeing and spent the _____ days at home．

A．last two relaxing

B．two last relaxing

C．relaxing last two

D．last relaxing two

砌筑砂浆抽检数量，每一检验批且不超过( )砌体的各种类型及强度等级的砌筑砂浆，每台搅拌机应至少抽检一次。

A．150m³

B．250m³

C．350m³

D．500m³