若分式方程无解，则a的值是（） A.－１B. 1 C. ±1�

若分式方程无解，则a的值是（）

A.－１　　　B. 1 C. ±1 D.-2

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若分式方程无解，则a的值是 （ ） A.－１B. 1 C. ±1�

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若分式方程无解，则a的值是（） A.－１B. 1 C. ±1�