The surprising experiment I am about to descr...

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 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.

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.

高三英语阅读理解中等难度题查看答案及解析

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．

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 presses against the egg and then the egg is pushed into the bottle! That 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 out 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

高三英语阅读理解简单题查看答案及解析

The wonderful experiment I am going to introduce proves that air is just all around and that it presses down upon us. 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 was 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.

高三英语长对话或独白中等难度题查看答案及解析

Dear Sir/Madam,

I am writing to 36 about the fat body of a(n) 37 I found in my ‘Vegetable Surprise’ last Thursday. It was 38 a surprise to me! A bad one, though. And even worse was that 39 when I realized only half of the white insect was left there on top of my green vegetables.

I informed the 40 of my problem and I did not expect him to 41 and tell me that insects were a good source of protein. I am a vegetarian!

In fact, I have eaten in your restaurant many times 42 and this is the first time I have been 43 . And I do not feel we should have been 44 for this meal, so I would ask you to 45 the cost. I await your reply.

Yours faithfully,

Mr. John Smith

1.                A．talk            B．complain        C．discuss   D．focus

2.                A．fish            B．animal          C．insect    D．bird

3.                A．sharply         B．oppositely       C．normally D．certainly

4.                A．inconvenience   B．memory        C．feeling   D．touch

5.                A．waitress        B．waiter          C．host D．hostess

6.                A．laugh          B．cry            C．leave     D．threat

7.                A．earlier         B．later           C．after     D．before

8.                A．surprised       B．limited          C．disappointed   D．satisfied

9.                A．charged        B．treated         C．paid D．distracted

10.               A．melt           B．refund（退还）  C．respond   D．reuse

高三英语完型填空中等难度题查看答案及解析

A recent experiment proves that bees can save time and energy when they fly around to different flowers.

Dr Nigel Raine, from the Royal Holloway University of London, has always been interested in finding out why animal behave like they do. He is also interested in bees. It was not a surprise when he and some other scientists from Queen Mary University of London discovered that bees can quickly solve a problem that takes computers many days.

Flowers make pollen (花粉), and when bees visit them, they carry the pollen to other flowers. The plants need the pollen to make seeds that will grow. Dr Raine notes that we get a lot of our food from plants, so it is important to know how the bees move around and take the pollen between flowers. The scientists wanted to examine the journey that the bees take and how they save energy when they do this. They completed the experiment on the roof of Queen Mary University, using artificial flowers and a large amount of nectar, a sweet liquid produced by flowers. They taught one bee to visit all the flowers in one place at the same time. When the bee got to know the location of the flowers well, they saw how it flew around and returned home with the nectar. After this, they changed the locations of the flowers. The scientists thought the bee would follow the route it knew already. This would mean that it followed a longer route than it needed to, and so it would use more energy. They watched the bee carefully as it travelled between the flowers in their new location, and they made notes. But in the experiment, the bee changed its route and flew a shorter distance.

The problem that the bee solved is similar to a maths puzzle called the ‘travelling salesman problem’. A salesman who goes to different places to sell things wants to travel the shortest distance. But he has to calculate the length of many possible routes to know which one is the shortest. A computer can calculate this but the experiment shows bees can do the same calculation quickly with a tiny brain. Scientists are very interested in how they do this. It would help us to understand how pollen is moved around. In addition, if they find this out, it could help us to improve communication networks. This might help humans to reduce traffic jams when there is an accident, for example.

1.The underlined word “nectar” in the third paragraph means_________.

A. powder B. honey

C. vitamin D. water

2.The researcher’s experiment found _________.

A. bees could manage to avoid accidents

B. bees showed signs of being very intelligent

C. bees could take the same route they knew before

D. bees were faster at calculating distance than computers

3.According to the last paragraph, the next step of the study is to discover how _______.

A. pollen is moved around

B. traffic jams can be reduced

C. bees can calculate so quickly

D. communication networks are improved

4.Where does this passage probably come from?

A. A novel. B. A website.

C. A science magazine. D. An advertisement.

高三英语阅读理解中等难度题查看答案及解析

More and more scientific experiments prove that physical exercise can reduce the dangers of some illnesses in middle-aged persons．Exercise strengthens the heart muscle，reduces blood pressure and help to prevent muscles from changing into fat．Physical exercise is just as important for children．

Exercise and food affect growing speed in young lab animals．Baby mice start running as soon as they are big enough to use an exercise wheel in their cage．If  they get extra food and run a lot，they will grow as much as 1.5 times bigger than normal．

The same differences in growing speed might be found between active and inactive children．Physical exercise helps active children grow faster than inactive children．One experiment shows that the brains of the mice that had enough exercise weighed about 3％more than those of the mice that did not exercise The mice that exercised are much quicker to learn doing new exercise than the mice that did not exercise．

The results of the experiments suppose the theory that exercise can help babies learn to talk and walk sooner than expected．

The good effects of physical exercise are not limited to children and middle-aged people．Exercise continues to be an important part of our lives after we grow old．For example，people over 50 years old begin to lose calcium(钙) from their bones，which get weaker and can break easily．Physical exercise，however，helps to strengthen the bones and to prevent them from losing calcium．Of course，old people can take medicines to prevent themselves from suffering from losing calcium．But the medicines they take increase the chance of developing some kind of cancer(癌)．So physical exercise is a much safer treatment(治疗)．

1.From the passage we know that         .

2.Active children        than inactive children．

3.Why are the bones of old people easy to break according to the passage?

4.The passage tells people that       .

高三英语阅读理解困难题查看答案及解析

To everybody’s surprise ，the fashionable young lady_________to be a thief。

高三英语单项填空简单题查看答案及解析

To whom it may concern,

This letter describes the worst travel experience I have ever had．The problems we had were the result of poor management and thoughtless employees．Your airline should be ashamed of treating its  customers so poorly．

On January 5, we arrived in Denver from Houston and checked in for our next flight．It wasn't long before the agent announced that our flight would be delayed because of a mechanical problem． The equipment was in Aspen, and they expected it to be repaired soon．

Soon shortly turned to much later, and during the delay, weather temporarily closed the Aspen airport．The weather cleared in Aspen and the plane took off very late for Denver．While it was in the air, the agent announced that the plane would be used for the next flight and that our flight was being cancelled．

This cancellation struck me as being unfair．There was a mad scramble （争先恐后） as the 50 or so passengers scheduled for our flight fought for seats on later flights．When the dust settled, we were wait-listed on the 9'-00 flight the next morning．We had to spend the night in the airport．

Coming home was no better．Because of a mechanical problem, it looked like we would miss our connection in Denver．The agent assured us they would hold the Newark flight for us．Needless to say, the flight to Houston taxied out as we pulled into the gate．Arrangements were made for us to take the next flight, so we sat in the airport for 5 hours．When we finally arrived in Houston, our skis were missing．As of this writing, the skis have not been found．

Nothing you can do will make us feel better about our flights．If you are a responsible business, however, you will do what you can to see that passengers in the future are treated better．

With great displeasure,

Phyllis Dooley

1.When Phyllis wrote her letter, she felt ______．

A．tired          B．fooled         C．annoyed        D．ashamed

2.What was Phyllis' destination when she left home on January 5?

A．Denver．       B．Houston．     C．Aspen．        D．Not mentioned

3.What happened to Phyllis on her day coming home?

A．She took a taxi to Houston airport．

B．Her flight to Houston was cancelled．

C．Her flight was delayed for five hours．

D．She missed her connection in Denver．

高三英语阅读理解中等难度题查看答案及解析

The results of the experiment proved to be very good, _________ was more than we expected.

A. which　　　　　　　　　 B. what

C. that　　　　 　　 　　 D. this

高三英语单项填空中等难度题查看答案及解析

The results of the experiment proved to be very good, _________ was more than we expected.

A. which　　　　　　　　　 B. what　　　　　　　 C. that　　　　　　　 D. this

高三英语单项填空中等难度题查看答案及解析