Here’s an amazing way to get a hard-boiled egg into a bottle, even though the mouth of the boiled is smaller than the egg! What’s more, you don’t even need to touch the egg to get it to go in!
For this experiment you will need:
·a hard-boiled egg
·a glass bottle with a mouth just slightly smaller than the egg (a fruit-drink bottle works well)
·a 8-cm by 8-cm(3-inch by 3-inch)piece of newspaper
·a match
Remove the shell from the egg. Set the egg on the mouth of the bottle to see that the egg does not fit through the mouth.
Light the paper. Remove the egg from the mouth of the bottle and drop the burning paper into the bottle. Before the fire goes out, set the egg back onto the mouth of the bottle. Within a few seconds the egg will squeeze(擠) through the mouth and into the bottle.
As it entered the bottle, the egg may have broken into pieces. This happens when the diameter(直徑) of the egg is more than about 0.5 cm(about 3/16 inch) larger than the diameter of the bottle’s opening.
Why does the egg slide into the bottle, even though no one is pushing it? Because the pressure of the air is pushing it. Before the burning paper is put into the bottle, the pressure of the air inside is the same as outside. The burning paper, however, heats the air inside. This causes the air inside to expand. When the egg is placed on top of the bottle, it seals(封住) the bottle. When the fire goes out, the air inside cools. As it cools, the air contracts(緊縮), and the pressure of the air inside becomes less than the pressure outside. Then, the higher outside pressure pushes the egg into the bottle!
小題1:The best title of this passage can be      .
A．An interesting storyB．The pressure of the air
C．Egg in a bottleD．Egg, bottle and match
小題2:What don’t you need in this experiment?
A．Eggs.B．Water.C．Bottles.D．Paper.
小題3:Why will the egg break into pieces while entering the bottle?
A．Because of the burning paper.
B．Because the diameter of the egg is too larger than that of the bottles opening.
C．Because it is cool inside the bottle.
D．Because the pressure of the air inside is larger.
小題4:What is the most important to get the egg into a bottle?
A．A match. B．A fruit-drink bottle.C．The pressure of the air.D．The burning paper.

小題1:C
小題2:B
小題3:B
小題4:C
略
練習(xí)冊系列答案
相關(guān)習(xí)題

科目：高中英語 來源：不詳 題型：閱讀理解


Decisions, decisions! Our lives are full of them, from the small ones to the life-changing. The right to choose is central to everyone. Yet sometimes we make bad decisions that leave us unhappy or full of regret. Can science help?
Most of us know little about the mental processes that lie behind our decisions. Luckily, what psychologists are finding may help us all make better choices. Here are some of their amazing discoveries to help you make up your mind.
Consider your emotions. You might think that emotions are the enemy of decision-making, but in fact they are a part of it. Whenever you make up your mind, your brain’s emotional centre is active. University of Southern California scientist, Antonio Damasia, has studied people with damage to only the emotional parts of their brains, and found that they were unable to make basic choices about what to wear or eat. Damasia thinks this may be because our brains store emotional memories of past choice, which we use to help the present decision-making.
However, making choices under the influence of an emotion can greatly affect the result. Take anger for example. A study by Nitika Garg of the University of Mississippi and other scientists found the angry shoppers were more likely to choose the first thing they were offered rather than considering other choices. It seems that anger can lead us to make quick decisions without much thinking.
All emotions affect our thinking and motivation，so it may be best to avoid making important decisions under their influence. Yet strangely there is one emotion that seems to help us make good choices. The American researchers found that sad people took time to consider the various choices on offer, and ended up making the best choices. In fact many studies show that people who feel unhappy have the most reasonable view of the world.
1. What does the underlined word “central” mean?
A. in the middle    B. easy to reach          C. important      D. having power
2. Damasia’s study suggests that ________.
A. emotions are the enemy of decision-making.
B. our brain has nothing to do with decision-making.
C. people with physical damage find it hard to make up their minds.
D. our emotional memories of past choices can affect present decisions.
3. According to the text, what may help us make better decisions?
A. To think about happy times.                  
B. To make many decisions at a time.
C. To stop feeling regretful about the past.
D. To learn about the process of decision-making.
4. Why are angry shoppers more likely to choose the first thing they are offered?
A. They often forget their past choices.         B. They make decisions without much thinking.
C. They tend to save time when shopping.  D. They are too angry to bargain.
5. What do we learn from the text?
A. Emotions are a part of decision-making.
B. Sad people always make worse choices.
C. No emotion seems to help us make good choices.
D. Only sad feelings affect our thinking and motivation.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解


II. 閱讀理解（Reading comprehension）（共20小題，計35分）
A）選擇題：閱讀下面短文，從A、B、C、D四個選項(xiàng)中，選出能回答所提問題或完成所給句子的最佳答案。（答案涂在答題紙上）
A
    Most people think that the capital of the movie world is Hollywood, in the United States. However, the real movie capital is Mumbai, in India. Mumbai used to be known as Bombay, and so the film industry there is called “Bollywood”. Bollywood makes twice as many movies each year as Hollywood—more than 800 films a year.
The movies from Bollywood are very different from Hollywood movies. For one thing, Bollywood movies are much longer than most Hollywood movies. Most Bollywood movies are more than three hours long, and contain singing, dancing, action, adventure, mystery, and romance. Because Bollywood films contain so many different features, this style of film is sometimes called a “masala” film. (“Masala” is an Indian word for a mixture of spices. )
Another big difference between Bollywood and Hollywood movies is the way the movies are made. It takes much longer to make a movie in Hollywood than in Bollywood. In fact, filming may begin on a Bollywood movie before the script is even finished. The director and writers can make up the story while the film is being made. Sometimes they will even write the script by hand instead of taking time to type it.

Bollywood actors are very popular and some are in such high demand that they may work on several movies at the same time. They may even shoot scenes for several films on the same day using the same clothes and scenery (舞臺布景）. Since most Bollywood movies follow the same kind of story, shooting scenes for several films at the same time is not a big problem for actors or directors. This also helps keep the cost of Bollywood movies lower than the cost of Hollywood movies. The average Bollywood film, with a budget （預(yù)算） of only two million U.S. dollars, seems very cheap compared to the average budget of sixty million U.S. dollars for a Hollywood film—thirty times as much!
51. The main topic of the passage is ________.
A. famous stars in Bollywood
B. how Hollywood movies are made
C. the differences between two movie industries
D. the history of movie-making in India
52. What is NOT true about Mumbai?
A. It is the movie capital of India.
B. Its new name is Bombay.
C. More movies are made there than in Hollywood.
D. The film industry there is called “Bollywood”.
53. Why are Bollywood films often called “masala” films?
A. They have interesting stories.
B. They are much longer than Hollywood films.
C. They show Indian culture.
D. They mix different styles of movies.
54. Bollywood movies are cheap to make because ________.
A. they are shorter than Hollywood films
B. the scripts are written by hand
C. the movies do not use any special effects
D. most movies reuse things from other movies
55. Which of these statements would the writer probably agree with?
A. Most Bollywood movies are very similar.
B. It takes a lot of money to make a good movie.
C. Only Indian people can understand Bollywood movies.
D. Hollywood movies are too violent.
B）非選擇題：閱讀下列短文，然后回答問題或完成句子。（答案寫在答題紙上）

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解


There are many American expressions about insects--- like bees, for example. Bees are known as very hard workers. They appear to be busy, moving around their homes, or hives (蜂窩). So you might say you were as busy as a bee if you spent your weekend cleaning your house. In fact, you might say your house was a beehive of activity if your whole family was helping you clean. You also might say you made a beeline for something if you went there right away. When we go to see a movie, my friend always makes a beeline for the place where they sell popcorn (爆米花) .
Here is an expression about bees that is not used much any more, but we like it anyway. We think it was first used in the 1920s. If something was the best of its kind, you might say it was the bee’s knees. Now, we admit that we do not know how this expression developed. In fact, we do not even know if bees have knees!
If your friend cannot stop talking about something because she thinks it is important, you might say she has a bee in her bonnet (女帽). If  someone asks you a personal question, you might say “that is none of your beeswax”. This means none of your business.
Speaking of personal questions, there is an expression when their children ask, “Where do babies come from?” Parents who discuss sex and reproduction (生殖) say this is talking about the birds and bees.
Butterflies are beautiful insects, but you would not want to have butterflies in your stomach. That means to be nervous about having to do something, like speaking in front of a crowd. You would also not want to have ants in your trousers. That is, to be unable to sit still.
1. If you make a beeline for something, you ______ .
A. are as busy as a bee            B. go quickly and directly towards it
C. always go to the same place     D. buy something at a certain place
2. The underlined expression “ it is the bee’s knees” _______ .
A. is not used at all now          B. was first used in the 1820s
C. reminds us that bees have knees  D. means “it is very good”
3. If you ask your American friend Jack “How old is your wife?” he may say “______.”
A. It is none of your beeswax      B. You have a bee in your bonnet
C. It is the bee’s knees            D. You are talking about the birds and bees
4. When you have butterflies in your stomach, you ______ .
A. are too sick to sit still           B. have ants in your trousers
C. are nervous about something     D. have a stomachache
5. The passage mainly tells us _______.
A. some interesting and useful insects  B. some expressions about insects
C. the way of learning expressions     D. some newly-invented expressions

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解


Having reached the highest point of our route according to plan, we discovered something the map had not told us. It was impossible to climb down into the Kingo valley. The river lay deep between mountain sides that were almost vertical（垂直）.We couldn’t find any animal tracks, which usually show the best way across country, and the slopes were covered so thickly with bushes that we could not see the nature of the ground. We had somehow to break through to the river which would give us our direction out of the mountains into the inhabited lowlands.
Our guide cut a narrow path through the bushes with his long knife and we followed in single file. Progress was slow. Then, when we thought we had really reached the river, we found ourselves instead on the edge of a cliff with a straight drop of 1,000 feet to the water below. We climbed back up the slope and began to look for another way down. We climbed slipped, sweated and scratched our hands to pieces and finally arrived at the river. Happily we came downhill along its bank without having to cut our way. However, after a few miles the river entered a steep-sided gap between rocks and suddenly dropped thirty-five feet over a waterfall. There was no path alongside it and no way round it.
Then one of the guides saw a way of overcoming the difficulty. There was a fallen tree lying upside down over the waterfall with its leafy top resting on the opposite bank below the falls. Without hesitation he climbed down the slippery trunk to show us how easy it was. Having got to the fork of the tree, he moved hand over hand along a branch for four or five feet with his legs hanging in space, then he dropped onto the flat bank the other side, throwing his arms in the air like a footballer who has scored goal, and cheerfully waving us on.
74．Having reached the highest point on their route, the travelers expected to be able to    .
A．track animals to the river
B．put away the maps they had been using
C．come near to the river from a different direction
D．get down to the river without much difficulty.
75．The travelers wanted to get to the river because      .
A．it would lead them to the waterfall
B．it would show them which way to go
C．it was the only possible way out of the mountains
D．it was a quicker way than going over the mountains
76．One reason why the travelers took so long to get to the river was that      .
A．it was too hot to move quickly
B．there was no proper path
C．they all tried to go different ways
D．they could not follow the animal tracks
77．To get past the waterfall the guide had to      .
A．use a fallen tree as a kind of bridge
B．cross the river above the waterfall
C．slide down a steep river bank
D．swing across the river from a high branch

查看答案和解析>>

科目：高中英語 來源：不詳 題型：完形填空


第三節(jié)：完形填空（共20小題；每小題1.5分,滿分30分）
閱讀下面短文,從短文后所給各題的四個選項(xiàng)（A、B、C和D）中,選出可以填入空白處的最佳選項(xiàng),并在答題卡上將該項(xiàng)涂黑。
I hired a plumber（水管工） to help me restore an old farmhouse, and he just finished a rough first day on the job: a  41 tire made him lose an hour of work, his electric drill quit and his ancient one ton truck refused to  42  .
   43  I drove him home, he sat in stony silence.    44  arriving, he invited me in to meet his   45 . As we walked toward the front door, he paused briefly at a small   46 , touching the tips of the branches with both   47 .
When   48 the door he passed through an amazing transformation. His brown face was in all smiles and he hugged his two small children and gave his   49 a kiss.  50 he walked me to the car. We passed the tree and my   51 got the better of me. I asked him about what I had   52 him do earlier.
"Oh, that's my   53 tree," he replied. "I know I can't help having troubles on the job, but one thing's   54 :those troubles don't   55 the house with my wife and the children. So I just hang them up on the tree    56  when I come home and ask God to    57 them. Then in the morning I   58 
them up again." "And the   59 thing is," he smiled, "when I come out in the morning to pick them up, there aren't   60 as many as I remember hanging up the night before."
41. A. smooth                  B. broken                  C. failed                     D. flat
42. A. begin                     B. start                       C. set                         D. launch
43. A. While                    B. During                   C. As soon as              D. Though
44. A. In                         B. For                        C. On                         D. At
45. A. friends                   B. parents                   C. family                    D. home
46. A. room                     B. tree                       C. flower                    D. wood
47. A. arms                      B. hands                     C. fingers                   D. feet
48. A. opening                 B. closing                   C. knocking                D. covering
49. A. wife                      B. daughter                C. son                        D. baby
50. A. Meanwhile             B. Afterwards             C. Previously              D. Consequently
51. A. satisfaction             B. responsibility          C. occupation              D. curiosity
52. A. heard                     B. made                     C. seen                       D. let
53. A. comfort                 B. pain                       C. suffering                D. trouble
54. A. at length                B. for sure                  C. at risk                   D. straight away
55. A. belong in               B. hold back               C. fit in                      D. bring to
56. A. one day                 B. every morning        C. one night                D. every night
57. A. take note of            B. take care of            C. look for                 D. focus on
58. A. pick                      B. take                       C. bring                     D. choose
59. A. flexible                  B. funny                    C. casual                    D. humorous
60. A. almost                   B. roughly                  C. nearly                    D. approximately

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解


B
People have always had to find ways to keep food safe to eat. Methods to dry, smoke and salt food were invented thousands of years ago. The process of canning is much more recent. This storage method keeps food safe to eat for long periods of time. Today, canning is one of the most popular methods of storing food.
Canning uses heat to kill bacteria and other micro-organisms that cause poisons to form in food. Canning also takes away the air that these organisms need to live. One popular method of canning uses a water bath.
Clean fruits or vegetables are placed in glass bottles. The food can be put into the bottles either hot or cold. The cold method is used for soft fruits and vegetables that could lose their shape or taste. Firmer fruits and most vegetables are usually cooked. They take up less space in the bottles. After the food has been placed in glass bottles, boiling water is poured into the bottles to about three centimeters below the top. Then covers are placed on the bottles, but are not turned all the way. The bottles are placed in a large container filled with warm water that is then brought to a boil. The water must completely cover the bottles, from three to five centimeters over the top. When the water boils, any air in the bottles will be expelled. The boiling continues for several minutes. Then the bottles are allowed to cool. Finally, they are placed briefly into cold water. This makes a strong barrier to keep the air out. In other words, a vacuum is created. When the bottles are completely cool, notes can be placed on them to identify what is inside. The bottles can then be stored in a cool, dark place at a temperature of between four and twenty-one degrees Celsius.
Canning allows your family to enjoy foods that might not come fresh throughout the year. It is also a good way to store food for six months to a year, or even several years, in case of an emergency. It does not cost much to continue canning every year once the equipment has been purchased.
You can get more information about canning food from the group, Volunteers in Technical Assistance. VITA is on the Internet at vita.org.
55. Which of the following is the right order of canning food?
a. put bottles in warm water.          b. place notes on the bottles.
c. place bottles briefly into cold water  d. pour boiling water into bottles
A. d a c b   B. a b c d    C. b d c a   D. a d c b
56. According to the text, which of the following is right?
A. The way to can food has been found by ancient Chinese.
B. Canning uses water to kill bacteria.
C. Hard fruits are suitable for cold method.
D. The boiling water will take away the air in the bottle.
57. What does the word “vacuum” mean in the – paragraph?
A. a missing situation   B. a gap   C. an enclosed space without air  D. a hole
58. what’s the best title of the text?
A. The advantages of canning food.
B. Canning food and health.
C. Put fruits and vegetables into cans.
D. How to make canning food.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解


六、Reading comprehension.(閱讀理解)20分
A
Air is an odorless(that cannot be smelled;smelless),invisible(that cannot be seen)gas that surrounds the planet earth.It is everywhere on the planet.An “empty” drinking glass and an “empty” room,to give two examples,are not really empty.Each is filled with air.When the glass is filled with water,the water pushes the air out of the glass.
Air,as a gas,has no definite(fixed,particular)shape,but,because it is matter,it takes up space.It is easy to prove that air is something that takes up space.Stuff a dry handkerchief into the bottom of a glass so that it will not fall out when the glass is turned upside-down.Push the upside-down glass,hold it straight into a jar of water till the glass is completely covered.When the glass is taken out of water,the handkerchief will be dry.The air inside the glass took up space and kept the water from coming in.
1.“Stuff a dry handkerchief into…”.The underlined word means.
A.Press tightly     B.Take out          C.Put down     D.Turn fully
2.The writer tells us that _________.
A.the experiment was done in the laboratory
B.the experiment was done outside the room
C.the experiment is easily done
D.the experiment is carried out indoors
3.Which of the following pictures gives us the correct result?
(W—water;A—air;H—handkerchief)

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解


E
Sweet potatoes are fat-free, high in fiber and full of the vitamins that research suggests reduce your risk of life-shortening diseases. To stay healthy, we must eat more fruits and vegetables, and sweet potatoes are a great source of beta carotene(胡蘿卜素) and other carotenoids(which the body turns into vitamin A). According to a study of the diets of almost 90,000 nurses, eating about one cup a day of fruits and vegetables rich in carotenoids can cut your risk of stroke in half and reduce your risk of heart disease by 22 percent. Other research suggests beta carotene protects against breast, lung and stomach cancers.
Beta carotene is the most famous member of the carotenoids family. In face, a medium-sized sweet potato contains nearly 12mg of beta carotene(anti-aging experts usually suggest 6 to 11 mg per day). Sweet potatoes are also a low-fat source of vitamin E. Research has linked high E diets with a lower risk of heart disease. This vitamin pill in an orange jacket also packs a vitamin C punchit which has more C than apricots (a kind of fruit). Research suggests that vitamin C protects against ailments (小疾) ranging from cataracts(an eye disease) to cancer. In addition, a UCLA (University of California Los Angeles) study linked high vitamin C diets with a longer life. Recent studies have showed that antioxidant Vitamins C, E and beta carotene fight a fierce battle against free radicals (自由基），which cause cell damage and lead to various illness. Therefore, to keep fit, eat more sweet potatoes.
72. According to the text, there exists a lot of ______in sweet potatoes.
A. fiber, beta carotene, other carotenoids, Vitamin E and C
B. beta carotene, other carotenoids, fiber, Vitamin A and E
C. Vitamin A, beta carotene, fiber, Vitamin E and C
D. beta carotene, other carotenoids, Vitamin A and E
73. This text as a whole suggests that eating sweet potatoes can help______.
A. cut your risk of stroke and heart disease
B. protect against breast, lung and stomach cancers
C. protect against ailments ranging from cataracts to cancers
D. you stay healthy and reduce your risk of life-shortening diseases
74. “ This vitamin pill in an orange jacket” in the passage refers to______.
A. sweet potato     B. vitamin C pill
C. vitamin E pill    D. beta carotene
75. The best title of this passage might be______.
A. On sweet potatoes             B. The vitamin superstar
C. Beta carotene and vitamins      D. Diet and disease

查看答案和解析>>

同步練習(xí)冊答案