When a passenger carries a POC on a corporate flight, he/she shall provide a medical certificate of fitness for travel, which shall be signed no earlier than ( ) days prior to the date of travel.
A.1 B.3 C.5 D.10正确答案D
When a passenger carries a POC on a corporate flight, he/she shall provide a medical certificate of fitness for travel, which shall be signed no earlier than ( ) days prior to the date of travel.
A.1 B.3 C.5 D.10正确答案D
