The possibility of being killed on a single airline flight is one in 4.7 million. Here are some lifesaving habits you are supposed to remember every time you fly.

Your carry-on bag

The safest thing to do with your carry-on is leave it on the plane. Flight crews ask you to keep your luggage clear of the aisles (通道) for a reason. 【小题1】 With as few as 90 seconds to evacuate (撤离) a burning place, the precious time spent reaching for luggage could be a life and death decision for someone.

Your seat

【小题2】 The safest place to sit on a plane is behind the wings. A Popular Mechanics study of 20 commercial jet crashes with both fatalities (死亡) and survivors found that passengers seated in the rear cabin (behind the wings) had a 69 percent chance of survival, compared with just 49 percent for those in first class.

During a crash

The first thing you should do during a crash is put on the oxygen mask the minute it drops.

During a loss of cabin pressure, the fall in oxygen can knock you unconscious in as little as 20 seconds. 【小题3】 You can’t help if you can’t breathe.

Listen to your flight attendants. Most importantly, through any emergency, be nice to the flight attendant.

What to wear

【小题4】 The US National Transportation Safety Board says that 68 percent of plane crash fatalities occur in post-crash fires, not in the initial impact.

Fortunately, here’s what you can plan for days in advance while you pack your suitcase: on the day you’re flying, avoid wearing synthetic fibers like polyester and nylon. Instead, choose natural materials like cotton or wool. It’s also a good idea to wear long pants (like jeans) and a long-sleeved shirt for extra protection from flames and sharp objects. 【小题5】

Sippers might seem like a good idea for braving airport security, but in the chaos of a crash or evacuation, they’ll only slow you down.