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单选题
With the loss of normal power, the standby power system supplies a minimum of 60 minutes of AC and DC power to systems necessary to maintain safe flight.
A
In the event of loss of normal power, the backup power system offers AC and DC power for at least 60 minutes to the systems to maintain the flight safe.
B
In order to hold the flight safety, the standby power system supplies a minimum of 60 minutes of AC and DC power to systems when the normal power is not available.
C
If there is no normal power, the standby power system provides AC and DC power to systems necessary to keep safe flight for at least 60 minutes.
答案解析
正确答案：C
