对正在进行行凶,杀人等暴力犯罪,采取防卫行为,造成不法侵害人伤亡的,（ ）

　The airlines prefer to have the ticket blow up as far in advance as possible .

　Air travel is just as safe and comfortable as any other kind of travel.

　The purpose of the oxygen system is to provide oxygen for the flight crew and passengers when required. Two independent oxygen system are installed in B737.

　Position/remove wheel kicks please.

　The emergency exits are located on either side of the plane.

　The brakes are unbelievable .

　He has demanded that we fly to xx, otherwise he is threatening bomb the plane and kill the hostage.

　Calm down！We will try our best to meet your friends.

　We need time to contact our authorities.

　They claim to have bombs.