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【单选题】
用钢尺在平坦地面上丈量一段距离,往测为 198.576 米,返测为 198.534 米,则该段距离的相对误差为( ) 。A.
1/4600
B.
1/4700
C.
1/4800
D.
1/5000
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A.
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B.
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C.
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