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【单选题】

According to this passage, the standardized measurements were first used ______.
A.when the steel beam was developed

B.when the Egyptians built the pyramids
C.when scientists wanted to make specific observation
D.when engineers designed microscopic measuring devices
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根据网考网移动考试中心的统计,该试题:

3%的考友选择了A选项

66%的考友选择了B选项

0%的考友选择了C选项

31%的考友选择了D选项

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