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阅读理解

  We know that there is air all around the earth.It is around us as we walk and play.From the time we were born, air is around us on every side.When we sit down, it is around us.When we go to bed, air is also around us.We live my air.We can’t see air, but we can feel it when it is moving.Moving air is called wind.How can we make air move? Here is one way.Hold an open book in front of your face, close it quickly.What can you feel? What you feel is air.

  All living things need air.Living things can not live without air.We can live without food or water for a few days, but we can’t live for more than a few minutes without air.We take in air.When we are working or running we need more air.When we are asleep, we need less air.Airplanes need air, too, they can not fly without air.They need it to lift their wings.Airplanes can not fly very high because as they go higher, the air gets thinner.If we go to high up from the earth, we find there is no air.

(1)

From the passage we can know that air is _________.

[  ]

A.

white

B.

yellow

C.

blue

D.

colorless

(2)

What will happen if you move a fan(电风扇)from side to side in front of your face?

[  ]

A.

You will feel air.

B.

There will be less air around you.

C.

There will be no air.

D.

You will see air moving in front of you.

(3)

Why can’t airplanes fly without air?

[  ]

A.

Because they need air to lift their wings.

B.

Because the pilots need air to see things for ahead.

C.

Because airplanes are driven by air.

D.

Because the pilots can not breathe(呼吸)without air.

(4)

Which of the following is RIGHT?

[  ]

A.

When we sleep, we will need no air.

B.

Animals can not live without air, but plants can.

C.

The higher the sky is, the thinner the air is.

D.

We don’t need too much air as we are running.

答案:1.D;2.A;3.A;4.C;
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