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【单选题】
Machine tools
vary
in size from handheld devices used for drilling and grinding to large stationary machines that perform a number of different operations.
A.exist
B.expand
C.compare
D.range
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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
12%
的考友选择了B选项
9%
的考友选择了C选项
77%
的考友选择了D选项
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