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stonE tools BEgAn to BE rEplACED ArounD 6,000 yEArs Ago By mEtAl tools, who wErE usED to BuilD instrumEnts AnD simplE mAChinEs.

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根据网考网移动考试中心的统计，该试题：

2%的考友选择了A选项

88%的考友选择了B选项

2%的考友选择了C选项

8%的考友选择了D选项

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