解分式方程x3+x-22+x=1时，去分母后可得到（）A．x（2+x）-2（3+x）=1B．x（2+x）-2=2+xC．x（2+x）-2（3+x）=（2+x）（3+x）D．x-2（3+x）=3+x-数

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