单选题:焊接检验包括焊前检验、焊接中检验和焊后检验。下列选项中属于焊接中检验的是(  )。

题目内容:
焊接检验包括焊前检验、焊接中检验和焊后检验。下列选项中属于焊接中检验的是(  )。 A.射线检测
B.焊接原材料检查
C.焊接环境检查
D.多层焊接层间缺陷的检查及清除

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