当x→0x \to 0x→0时,ln(1+x2)\ln(1 + x^{2})ln(1+x2)是2x22x^{2}2x2的( ).
(A)低阶无穷小
(B)高阶无穷小
(C)等价无穷小
(D)同阶但非等价无穷小
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