【正确答案】正确答案：The three important points developed in Prague School are: (a) It was stressed that the synchronic study of language is fully justified as it can draw on complete and controllable material for investigation but no rigid theoretical barrier is erected to separate diachronic study. (b) There was an emphasis on the systemic character of language. (c) Language was looked on as functional in another sense, that is, as a tool performing a number essential functions or tasks for the community using it.