3x+6=15的解为____。
— _____ you at school last night?
— No, I _____ at home.
— Do you feel like ______ out for a walk ?— Sorry, I would like ____ at home.
生产决定消费,消费对生产具有重要反作用。下列选项中,体现消费对生产具有重要反作用的是( )