X线管的真空度应保持在A.133.3×10Pa B.133.3×10Pa C

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问题 X线管的真空度应保持在A.133.3×10PaB.133.3×10PaC.133.3×10PaD.133.3×10PaE.133.3×10Pa

选项 A.133.3×10PaB.133.3×10PaC.133.3×10PaD.133.3×10PaE.133.3×10Pa

答案 B

解析 X线管的真空度应保持在133.3×10PA
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