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单选题
ON THE ENHANCED TOILET SYSTEM, WHEN YOU OPEN THE TOILET SERVICE PANEL:
A
The waste tank is automatically ventilated for servicing.
B
A signal from the service panel microswitch energizes the fill/overflow/drain valve to service the toilet system.
C
A ACUUM SYSTEM DISABLED-GROUND SERVICING?message is displayed on the Flight Attendant Panel (FAP).
答案解析
正确答案：C
