Which one below is not a possible source of caregiver s...
单项选择题Which one below is not a possible source of caregiver speech?
A、Our faint memory of how our parents once talked to us.
B、Our observations of how other adults speak to their children.
C、Our observations of the kinds of productions children use.
D、Our knowledge of the mother tongue.
、
与场函数
、
的关系式，正确的是（ ）。 A. 
B. 
C. 
D. 