【单选题】
热继电器中的双金属片弯曲是由于两金属片（ ）
A. 机械强度不同
B. 热膨胀系数不同
C. 温差效应
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答案
B
解析
暂无解析
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【单选题】
按钮联锁正反转控制线路的优点是操作方便，缺点是容易产生电源两相短路事故。在实际工作中，经常采用( )正反转控制线路。
A. 按钮联锁
B. 接触器联锁
C. 按钮、接触器联锁
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Which storage feature always requires the use of third-party software on ESXi?___
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An ESXi host's VMCA-Signed certificate has expired. How can the certificate be renewed?___
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Which is the correct order for upgrading vSphere components?___
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When attempting to migrate a virtual machine to another host in the same cluster, the error message, “Select a valid compute resource” returns. What could cause this error?___
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When will vSphere Data Protection delete the expired backup image of a Platform Service Controller?___
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Group A has permission to download files in Content Library. Group B does not have permission to download files in Content Library. If a user is a member of both groups, what will be the result?___
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