用一把名义长度为30M实际长度为30.0025M的钢尺量得某段距离为221.756M,则该距离的尺长改正为（）。

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【单选题】【消耗次数：1】

① 0.0185

② -0.0185

③ 0.5544

④ -0.5544

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