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单选题
277.当APU转速大于95%,飞行高度大于23000英尺,无引气渗漏,APU:( ) When APU running above 95% and flight up to 23000 ft and no bleed leak.then APU:
A
只能供气 Only pneumatic powercan be used.
B
只能供电 Only electrical power can be used.
C
既能供气又能供电 Pneumatic and electrical powercan be used.
答案解析
正确答案：B
解析：
当APU转速大于95%，飞行高度大于23000英尺，无引气渗漏，APU可以提供电力。答案选项B是正确的，因为题目中提到飞行高度大于23000英尺且无引气渗漏，这种情况下APU可以继续提供电力，但不会提供气源。
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