Language acquisition device（LAD)was proposed by______.A．SapirB．SaussureC．ChomskyD．Halliday

The critical age for language acquisition refers to the qualitative difference in la

Negative transfer in second language acquisition is known asA．interference.B．fossilization

Language acquisition is one of the central topics in cognitive science. Every theory of

In second language acquisition, age is an important factor.（)

Motivation is not an important factor in second language acquisition except.（)

The following are the individual differences that affect the second language acquisition E