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方程\(ax - 4y = x - 1\)是关于\(x\),\(y\)的二元一次方程,则\(a\)的取值为\((\) \()\)
A.\(a \ne 0\)
B.\(a \ne 4\)
C.\(a \ne 1\)
D.\(a \ne - 1\)
参考答案:C
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