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单选题
When there is an "emergency" situation, it is usually a failure that requires an immediate and quick response, such as an entire engine failure, fire or smoke, or perhaps a rapid drop in cabin pressure.
A
For "emergency", the related failure should be responded immediately, for example, the total engine failure, fire or smoke, sudden cabin pressure lost.
B
An "Emergency" almost including a serious failure that requires later response, such as a total engines failure, flame out or smoke, or rapid cabin pressurization.
C
For "emergency", the related failure should be treated immediately, for example, the total engine is not malfunctioning, fire or smoke, sudden cabin pressure lost.
答案解析
正确答案：A
