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设用两种仪器测量同一物体的长度分别得到如下结果:X1=5.51±0.05mmX2=5.80±0.02mm为综合这两种测量结果以便公布统一的结果，拟采用加权平均方法，每个数的权与该数的绝对误差的平方成反

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A、5.76

B、5.74

C、5.57

D、5.55

参考答案:

A

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