Questão 2555922

Read the text and answer the questions 39, 40 and 41.

PRESSURE

Jeremy Berke

1 Commercial airplane cabins are generally pressurized to

an equivalent of 6,000 to 8,000 feet above sea level, in an

effort to maintain a healthy oxygen level for both the

passengers and the flight crew. When a passenger jet is flying

5 at a cruising altitude of over 36,000 feet, the pressure outside

the cabin is_____________ than inside the pressurized cabin.

Air pressure has a tendency to equalize, moving from areas

of high pressure to low pressure to achieve equilibrium.

When a hole rips open on a plane, the suction resulting from

10 the pressure difference between the cabin and the sky could

pull nearby people or objects outside. Depending on the size

of the hole, such accidents could either create just enough

force to shuffle papers around, or, pull a full-size human out

of the plane. Survival is unlikely for anyone fully sucked out

15 into the sky.

While in-flight incidents are extremely rare, if you want

to survive a crash, research suggests the best place to sit is in

a middle seat toward the back of the plane.

http://www.businessinsider.com/

Choose the best alternative to have the text completed correctly.