解下列分式方程: (k) x 2x-5 -k= 5 5-2x .&n2sp;&n2sp;&n2sp;&n2sp;&n2sp;&n2sp;&n2sp;&n2sp;&n2sp;&n2sp; (2) 2 x+k + 3 x-k = 6 x 2 -k .
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参考答案:
举一反三
【单选题】______means that language can be used to refer to the contexts that are removed from the immediate situation of the speaker, especially, time and space.