The problem solving can be divided into three states（）

多项选择题What are the stages of language development in vygowski’s theory.（）

A.Social
B.Egocentric
C.Pre-operation stage
D.Inner

单项选择题The following concepts do not belong to Piaget’s Theory（）.

A.Equilibration
B.Evolution
C.Assimilation
D.Accommodation

多项选择题Language structures include（）

A.Phonology
B.Morphology
C.Semantics
D.Syntax

单项选择题What was the earliest research on Functional Equivalence Theory.（）

A.Suspension bridge experiment
B.Open-window experiment
C.Mental rotation experiment
D.Three Mountain Task Perspective

多项选择题In Galton’s 1880 experiment，which dimensions do subjects need to describe specifically.（）

A.Contrast ratio
B.Brightness
C.Definition
D.Color