乳油在硬水中使用效果更好。
参考答案:错
--- Can I call for some friends and spend the day outside with them, Mom?
--- ____ I’ve told you to have a weekend on your own.
A.Why so?
B.Why not?
C.How come?
D.So what?
绿色营销是着眼于( )的新概念。
A.消费者层面
B.企业层面
C.社会层面
D.政府层面