—_______?

—She's staying at home.         [ ]

A.  Where is she                  

B.  What is she doing this weekend

C.  Where are you going        

D.  How long is Lily staying at home

脉冲电子围栏应提供有效的质量证明材料是（）。

A.3C认证证书

B.型式检验报告

C.生产登记批准书

D.委托检验报告