【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