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【单选题】

metal must be hammered and cooled rapidly to ________ internal stress caused by heating.
A.retain

B.release
C.relieve
D.replace
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根据网考网移动考试中心的统计,该试题:

19%的考友选择了A选项

62%的考友选择了B选项

9%的考友选择了C选项

10%的考友选择了D选项

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