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单选题
An "emergency", however, almost always involves a failure that requires immediate and rapid response, such as a total powerplant failure, fire or smoke, or rapid cabin decompression.
A
A.“紧急情况”却几乎总是出现某个故障需要立即处理，例如全部动力装置故障、火灾或烟雾或客舱快速释压。
B
B.然而，“紧急情况”几乎总是涉及需要立即快速响应的失效，如一发完全失效、机上失火或冒烟或客舱快速释压。
C
C.而“紧急情况”总是包括某种故障需要快速应对，比如动力装置完全失效，火灾或烟雾或者快速客舱失压。
答案解析
正确答案：C
相关知识点：
紧急情况常涉故障，需立即快速响应
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