Question

    Flying is a fast way to travel. But it is a big headache for some people. They can’t help worrying about things like “Is it dangerous if we don’t change our mobile phones to airplane mode(飞行模式)? ”Here are some interesting facts about flying.

Why are plane windows round?

It’s for safety. As the airplane flies higher and higher, the atmospheric pressure(气压)outside gets lower and lower. During the flight, the pressure inside the plane becomes greater than the pressure outside.

When this happens, square windows can break. That’s because having different pressures inside and outside puts stress on the corners of square windows. But rounded corners can spread the pressure more evenly(均匀地)across the window’s surface(表面)，making it less likely to break.

What happens when a phone isn’t in airplane mode? 

Some passengers believe mobile phones and tablets need to be turned off  because they can bring the plane down. However, this is not true.

If you don’t change your phone to airplane mode, plots and air traffic controllers may hear unpleasant sounds in their headphones. This makes it harder for them to communicate. So it’s still best to put your devices(设备) in airplane mode.

Facts about flying
Round windows	It’s for 1. . As the airplane flies higher ,the pressure2.the plane is greater than the pressure3. When this happens, square windows can 4.while round windows spread the pressure more evenly5.the window’s surface.
Phones in airplane mode	Some people believe that their plane will crash if they don’t 6.their devices off. It’s not7.. Keep your phone on while flying will make unpleasant 8. in pilots’ and air traffic controllers’ 9..This makes it harder for them to10. .

Answer

1.safety

2.inside

3.outside

4.break

5.across

6.turn

7.true

8.sounds

9.headphones

10.communicate

【解析】

本文向我们介绍了几个关于飞机飞行的事实。首先飞机上采用圆窗而不是方窗是因为，在飞行过程中，内部压力比外部大，圆窗能够把压力平均的传到机身上。第二，在飞机上如果不关闭手机，会影响飞行员与空中管制员之间的交流，但是不会造成飞机坠毁的现象。

1.根据文章内容“It’s for safety.”是为了安全；故填safety。

2.根据文章内容“During the flight, the pressure inside the plane becomes greater than the pressure outside.” 在飞行过程中，飞机内部的压力比外部的压力大。故填inside。

3.根据文章内容“During the flight, the pressure inside the plane becomes greater than the pressure outside.” 在飞行过程中，飞机内部的压力比外部的压力大。故填outside。

4.根据文章内容“When this happens, square windows can break.” 当这种情况发生时，方窗可能会破裂。故填break。

5.根据文章内容“But rounded corners can spread the pressure more evenly(均匀地)across the window’s surface(表面)，making it less likely to break. ”但是圆角可以使压力更均匀地分布在窗户的表面上，从而减少破裂的可能性。故填across。

6.根据文章内容“Some passengers believe mobile phones and tablets need to be turned off because they can bring the plane down. However, this is not true.” 一些乘客认为，手机和平板电脑需要关闭，因为它们可以使飞机坠毁。然而，这不是真的。可知，空格处为把设备关闭，故填turn。

7.根据文章内容“Some passengers believe mobile phones and tablets need to be turned off because they can bring the plane down. However, this is not true.” 一些乘客认为，手机和平板电脑需要关闭，因为它们可以使飞机坠毁。然而，这不是真的。故填true。

8.根据文章内容“If you don’t change your phone to airplane mode, plots and air traffic controllers may hear unpleasant sounds in their headphones. ” 如果你不把你的手机切换到飞行模式，飞行员和空中交通管制员可能会在他们的耳机里听到不愉快的声音。可知会产生不愉快的声音，故填sounds。

9.根据文章内容“If you don’t change your phone to airplane mode, plots and air traffic controllers may hear unpleasant sounds in their headphones. ” 如果你不把你的手机切换到飞行模式，飞行员和空中交通管制员可能会在他们的耳机里听到不愉快的声音。可知，是在耳机中产生，故填headphones。

10.根据文章内容“This makes it harder for them to communicate.” 这使得他们更难沟通。故填communicate。