問題詳情

50. The author says in Paragraph 3 that _________
(A) human cognitive systems have been thoroughly investigated but have proven to be accidental and simple.
(B) language is one part of human cognitive structure which is not worth scientific study.
(C) the acquisition of human cognitive structure is as miraculous and complicated as the development of physical structure.
(D) the study of human cognitive systems is difficult because no scientific evidence is available.

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