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

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

判断题 Chomsky has argued that all languages have the same underlying，abstract structure-universal grammar.（）

多项选择题 Language structures include（）

判断题 Imagery may affect the activities of primary visual brain areas from top tobottom，while visual perception mainly processes information in primary visual cortex from bottom to top，and then enters other brain areas.（）