共 4 類科共用卷 民航人員考試三等考試-飛航管制科別民航人員考試三等考試-航務管理科別民航人員三等考試-適航檢查民航人員三等考試-航空通信英文112 年第 7 題單選題It’s been two weeks since the body was found, but the police have so far been unable to ___ who the victim is, let alone arrest the murderer.Aascertain正確答案BdemonstrateCinvestigateDjustify 答案與詳解