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若奇函数\(f\left ( {x} \right )\)满足\(f(1 + x) = f(1 - x)\),且当\(0 \leqslant x \leqslant 1\)时,\(f(x) = x\).则\(f(2021)\)的值是( )
A.0
B.1
C.\(-1\)
D.\(\frac{1}{2}\)
参考答案:B
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