【单选题】 In the metals industry, hydrogen is used to prevent metals from tarnishing while undergoing__________.
A.treated by heat
B.heat treatments
C.by heat treatments
D.heat-treated
网考网参考答案:B
网考网解析:
13—14 暂缺
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【单选题】 In the metals industry, hydrogen is used to prevent metals from tarnishing while undergoing__________.
A.treated by heat
B.heat treatments
C.by heat treatments
D.heat-treated
网考网参考答案:B
网考网解析:
13—14 暂缺
查看试题解析出处>>
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