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In the metals industry, hydrogen is used to prevent metals from tarnishing while
In the metals industry, hydrogen is used to prevent metals from tarnishing while
游客
2024-01-04
19
管理
问题
In the metals industry, hydrogen is used to prevent metals from tarnishing while undergoing______.
选项
A、treated by heat
B、heat treatments
C、by heat treatments
D、heat-treated
答案
B
解析
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