艺术课程中的实践性能力结构，指的是由______这三个方面共同构成的实践性艺术能力。
In terms of the meaning expressed by words, they can be classified into _____.
A. grammatical words and lexical words
B. content words and lexical words
C. grammatical words and function words
D. pro-forms and auxiliaries
________other than compounds may be divided into roots and affixes.
A. polymorphemic words
B. bound morpemes
C. free morphemes
D. monomorphemic words
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