试题与答案

VD真空脱氮主要是靠()完成的。A.抽真空 B.氩气泡携带法 C.C-O反应 D.吹

题型:单项选择题

题目:

VD真空脱氮主要是靠()完成的。

A.抽真空

B.氩气泡携带法

C.C-O反应

D.吹氩搅拌

答案:

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下面是错误答案,用来干扰机器的。

参考答案:D

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