摘要： The experiment is carried cut to prove . A. water pushes on your body when you swim underwater. B. the earth is surrounded by a layer of air called the atmosphere. C. the pressure of air around us has a powerful force. D. the air pressure is not equalized around us. 答案 60.B 61.C 62.D 63.C Passage 17 A volcanic eruption in Iceland has sent ash across northern Europe. Airlines have stopped or changed the flights across the Atlantic Ocean, leaving hundreds of passengers stuck in airports. Grirmsvom is one of the largest and most active volcanoes in Europe. What makes Grimsvom different is that it lies under a huge glacier of ice up to 12 maters thick. The hot volcano heats up the ice above it, which then forms a layer(层)of water between the glacier and the volcano This layer of water puts pressure on the volcano, keeping it stable, As the water flows out from under the glacier, the pressure lifts. The lava from the volcano then comes up to the surface. This is exactly what happened today. Now, airlines have to make changes to their flights so as not to fly through the clouds of volcanic ash. According to KLM. one of Europe’s biggest airlines, airplanes cannot go under the cloud or over it. Going through the cloud can result in ash getting stuck in the airplane’s engines, causing damage to the plane. The eruption has also caused problems for animals in Iceland. The volcano left ash and sharp. Glass-like rocks all over the countryside. Farmers are keeping their animals inside to stop them from eating ash- covered grass to the sharp object.

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     The surprising experiment I am about to describe proves that air is all around you and that it proves down
upon you. Air pressure is a wonderful force. When you swim underwater, you can feel water push down
your body. The air all around you does the same. However, your body is so used to it that you do not notice
this. The pressure is caused by a layer of air called the atmosphere. This layer surrounds the Earth, extending
to about five kilometers above the Earth's surface.
     The following experiment is an easy one that you can do at home. But make sure that you are supervised,
because you will need to use matches. Now for the experiment!
     What you need
     ·A hard-boiled egg without the shell
     ·A bottle with a neck slightly smaller than the egg
    ·A piece of paper
    ·A match
     Method
     1) Check that the paper will sit firmly on the neck of the bottle.
     2) Tear the paper into strips and put the strips into the bottle.
    3) Light the paper by dropping a burning match into the bottle.
     4) Quickly sit the egg on the neck of the bottle.
     Result
     Astonishingly, the egg will be sucked into the bottle. Your friends will be amazed when you show them
the experiment. But be careful when you handle matches.
     Why it happened
     As the paper burns, it needs oxygen and uses up the oxygen (air) in the bottle. The egg acts as a seal in
the neck of the bottle, so no more air can get inside. This reduces the air pressure inside the bottle. The air
pressure must equalize, so more air from outside must enter the bottle. The outside air pressure against the
egg and then the egg is pushed into the bottle! This proves that air is all around and that it is pressing down
on it.

1. Why is there the need to take care when you are doing the experiment?

A. The bottle could break.
B. You need to light the paper with a match.
C. The egg needs to be shelled.
D. The egg has to be perfectly placed on the neck of the bottle.

2. In the experiment, the burning inside the bottle can _____.

A. equalize the air pressure inside and outside
B. make a seal in the neck of the bottle
C. finish up the oxygen inside the bottle
D. produce more oxygen inside the bottle

3. How did the egg put into the bottle?

A. The oxygen inside the bottle sucked the egg in.
B. It became salt without the shell.
C. The neck of the bottle was wide enough.
D. The outside air pressure forced it into the bottle.

4. The experiment is carried cut to prove _____.

A. water pushes on your body when you swim underwater.
B. the earth is surrounded by a layer of air called the atmosphere.
C. the pressure of air around us has a powerful force.
D. the air pressure is not equalized around us.

查看习题详情和答案>>

The following experiment is an easy one that you can do at home. But make sure that you are supervised, because you will need to use matches. Now foe the experiment！

What you need

?A hard-boiled egg without the shell

?A bottle with a neck slightly smaller than the egg

?A piece of paper

?A match

Metheod

1） Check that the paper will sit firmly on the neck of the bottle.

2） Tear the paper into strips and put the strips into the bottle.

3） Light the paper by dropping a burning match into the bottle.

4） Quickly sit the egg on the neck of the bottle.

Result

Astonishingly, the egg will be sucked into the bottle. Your friends will be amazed when you show them the experiment. But be careful when you handle matches.

Why it happened

As the paper burns, it needs oxygen and uses up the oxygen （air） in the bottle. The egg acts as a seal in the neck of the bottle, so no more air can get inside. This reduces the air pressure inside the bottle. The air pressure must equalize, so more air from outside must enter the bottle. The outside air pressure against the egg and then the egg is pushed into the bottle! The proves that air is all around and that it is pressing down on it.

60. Why is there the need to take care when you are doing the experiment?

A. The bottle could break.

B. You need to light the paper with a match.

C. The egg needs to be shelled.

D. The egg has to be perfectly placed on the neck of the bottle.

61. In the experiment, the burning inside the bottle can___.

A. equalize the air pressure inside and outside

B. make a seal in the neck of the bottle

C. finish up the oxygen inside the bottle

D. produce more oxygen inside the bottle

62. How did the egg put into the bottle？

A. The oxygen inside the bottle sucked the egg in.

B. It became salt without the shell.

C. The neck of the bottle was wide enough.

D. The outside air pressure forced it into the bottle.

63. The experiment is carried cut to prove ______.

A. water pushes on your body when you swim underwater.

B. the earth is surrounded by a layer of air called the atmosphere.

C. the pressure of air around us has a powerful force.

D. the air pressure is not equalized around us.

查看习题详情和答案>>

The surprising experiment I am about to describe proves that air is all around you and that it presses down upon you. Air pressure is a powerful force. When you swim underwater, you can feel water pushing down on your body. The air all around you does the same. However, your body is so used to it that you do not notice this. The pressure is caused by a layer of air called the atmosphere. This layer surrounds the Earth, extending to about five kilometers above the Earth’s surface.

The following experiment is an easy one that you can do at home. But make sure that you are supervised, because you will need to use matches. Now for the experiment！

What you need

??A hard-boiled egg without the shell

??A bottle with a neck slightly smaller than the egg

??A piece of paper

??A match

Method

1） Check that the egg will sit firmly on the neck of the bottle.

2） Tear the paper into strips and put the strips into the bottle.

3） Light the paper by dropping a burning match into the bottle.

4） Quickly sit the egg on the neck of the bottle.

Result

Astonishingly, the egg will be sucked into the bottle. Your friends will be amazed when you show them the experiment. But be careful when you handle matches.

Why it happened

As the paper burns, it needs oxygen and uses up the oxygen （air） in the bottle. The egg acts as a seal in the neck of the bottle, so no more air can get inside. This reduces the air pressure inside the bottle. The air pressure must equalize, so more air from outside must enter the bottle. The outside air pressure against the egg and then the egg is pushed into the bottle! This proves that air is all around and that it is pressing down on it.

Why is there the need to take care when you are doing the experiment?

A. The bottle could break.

B. You need to light the paper with a match.

C. The egg needs to be shelled.

D. The egg has to be perfectly placed on the neck of the bottle.

In the experiment, the burning inside the bottle can___.

A. equalize the air pressure inside and outside

B. make a seal in the neck of the bottle

C. finish up the oxygen inside the bottle

D. produce more oxygen inside the bottle

How did the egg put into the bottle？

A. The oxygen inside the bottle sucked the egg in.

B. It became saft without the shell.

C. The neck of the bottle was wide enough.

D. The outside air pressure forced it into the bottle.

The experiment is carried cut to prove ______.

A. water pushes on your body when you swim underwater.

B. the earth is surrounded by a layer of air called the atmosphere.

C. the pressure of air around us has a powerful force.

D. the air pressure is not equalized around us.

查看习题详情和答案>>

The surprising experiment I am about to describe proves that air is all around you and that it presses down upon you. Air pressure is a powerful force. When you swim underwater, you can feel water pushing down on your body. The air all around you does the same. However, your body is so used to it that you do not notice this. The pressure is caused by a layer of air called the atmosphere. This layer surrounds the Earth, extending to about five kilometers above the Earth’s surface.
The following experiment is an easy one that you can do at home. But make sure that you are supervised, because you will need to use matches. Now for the experiment！
What you need
?A hard-boiled egg without the shell
?A bottle with a neck slightly smaller than the egg
?A piece of paper
?A match
Method
1） Check that the egg will sit firmly on the neck of the bottle.
2） Tear the paper into strips and put the strips into the bottle.
3） Light the paper by dropping a burning match into the bottle.
4） Quickly sit the egg on the neck of the bottle.
Result
Astonishingly, the egg will be sucked into the bottle. Your friends will be amazed when you show them the experiment. But be careful when you handle matches.
Why it happened
As the paper burns, it needs oxygen and uses up the oxygen （air） in the bottle. The egg acts as a seal in the neck of the bottle, so no more air can get inside. This reduces the air pressure inside the bottle. The air pressure must equalize, so more air from outside must enter the bottle. The outside air pressure against the egg and then the egg is pushed into the bottle! This proves that air is all around and that it is pressing down on it.

1.
Why is there the need to take care when you are doing the experiment?
1. A.
  The bottle could break.
2. B.
  You need to light the paper with a match.
3. C.
  The egg needs to be shelled.
4. D.
  The egg has to be perfectly placed on the neck of the bottle.
2.
In the experiment, the burning inside the bottle can___.
1. A.
  equalize the air pressure inside and outside
2. B.
  make a seal in the neck of the bottle
3. C.
  finish up the oxygen inside the bottle
4. D.
  produce more oxygen inside the bottle
3.
How did the egg put into the bottle？
1. A.
  The oxygen inside the bottle sucked the egg in.
2. B.
  It became saft without the shell.
3. C.
  The neck of the bottle was wide enough.
4. D.
  The outside air pressure forced it into the bottle.
4.
The experiment is carried cut to prove ______.
1. A.
  water pushes on your body when you swim underwater.
2. B.
  the earth is surrounded by a layer of air called the atmosphere.
3. C.
  the pressure of air around us has a powerful force.
4. D.
  the air pressure is not equalized around us.

查看习题详情和答案>>

The following experiment is an easy one that you can do at home. But make sure that you are supervised, because you will need to use matches. Now foe the experiment！

What you need

·A hard-boiled egg without the shell

·A bottle with a neck slightly smaller than the egg

·A piece of paper

·A match

Metheod

1） Check that the paper will sit firmly on the neck of the bottle.

2） Tear the paper into strips and put the strips into the bottle.

3） Light the paper by dropping a burning match into the bottle.

4） Quickly sit the egg on the neck of the bottle.

Result

Astonishingly, the egg will be sucked into the bottle. Your friends will be amazed when you show them the experiment. But be careful when you handle matches.

Why it happened

1.Why is there the need to take care when you are doing the experiment?

A. The bottle could break.

B. You need to light the paper with a match.

C. The egg needs to be shelled.

D. The egg has to be perfectly placed on the neck of the bottle.

2.In the experiment, the burning inside the bottle can___.

A. equalize the air pressure inside and outside

B. make a seal in the neck of the bottle

C. finish up the oxygen inside the bottle

D. produce more oxygen inside the bottle

3.How did the egg put into the bottle？

A. The oxygen inside the bottle sucked the egg in.

B. It became salt without the shell.

C. The neck of the bottle was wide enough.

D. The outside air pressure forced it into the bottle.

4.The experiment is carried cut to prove ______.

A. water pushes on your body when you swim underwater.

B. the earth is surrounded by a layer of air called the atmosphere.

C. the pressure of air around us has a powerful force.

D. the air pressure is not equalized around us.

查看习题详情和答案>>

Why is there the need to take care when you are doing the experiment?

In the experiment, the burning inside the bottle can___.

How did the egg put into the bottle？

The experiment is carried cut to prove ______.

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