题目内容

电力设备、施工机械损坏,直接经济损失达()万元,构成重大设备事故。

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因受压而出现反应性充血的皮肤组织,变换体位后在多少分钟内恢复?()

A. 10~20分钟
B. 30~40分钟
C. 50~60分钟
D. 70~80分钟
E. 90~100分钟

下列选项中,()可能造成非违约方信赖利益的损失。

A. 实际违约
B. 预期违约
C. 不作为的违约
D. 作为的违约

《建筑桩基技术规范》中,预应力高强混凝土管桩代号为()。

A. PC
B. PHC
C. PS
D. PHS

When can routine communications be resumed when radio silence has been imposed?()

After determining that the frequency or channel appears to be no longer in use
B. After determining that geographic distance from the distress situation will prohibit any other signal from interfering with emergency communications
C. Routine communications can resume after the Rescue Coordination Center transmits a message on the frequency or channel being used for emergency communications stating that such traffic has concluded
D. If,in the Master's opinion,communications on that frequency will interfere with emergency communicatio

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