(3)设L为半圆周 =sqrt (4x-{x)^2-3}, 则 _(1)=(int )_(L)dfrac (1)(sqrt [3]{x)}ds 与 _(2)=(int )_(t)dfrac (sqrt [3]{y)}(2)ds 的大小关系为 () .-|||-(A) _(1)gt (I)_(2) (B) _(1)=(I)_(2) (C) _(1)lt (I)_(2) (D)不确定

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