看图，判断对“√”错“×”。

( ) 1.  Are they his shorts?

( ) 2.  Whose dress is this?

( ) 3.  They are my shoes.

信度是用来表明测量工具的（）。

A.效度

B.偏倚度

C.便利性

D.可靠性

E.敏感性