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题型:阅读理解-阅读单选 难度:0.65 引用次数:28 题号:20278947

When peanuts are dropped into a glass of beer, they sink to the bottom before floating up and “dancing” in the glass. Scientists investigated this process in a study involving the alcoholic drink beer. The research helped them understand mineral extraction (提炼) or magma (岩浆) in the layer of Earth called the crust.

Brazilian researcher Luiz Pereira told the media that he first had the idea when passing through Argentina’s capital Buenos Aires to learn Spanish. It was common for barkeepers to take a few peanuts and drop them into beers. Because the peanuts are denser (密度大的) than the beer, they first sink to the bottom of the glass. Then each peanut becomes what is called a “nucleation site”. Hundreds of tiny bubbles (气泡) of CO2 form on their surface. The bubbles act as floatation devices that carry the peanuts upward. The bubbles prefer to form on the peanuts rather than on the glass. When the bubbles reach the surface, they burst. The peanuts sink again before newly formed bubbles send the peanuts up again. Like a dance movement, the peanuts continue sinking and floating until the CO2 runs out, or someone drinks the beer.

In the experiments, the team of researchers examined how peanuts acted in the “beer-gas-peanut system”. They found the larger the “contact angle” between the curve of an individual bubble and the surface of the peanut, the more likely it will grow. But it cannot grow too much—less than 1.3 millimeters across is best.

Pereira said he hoped that by deeply researching this simple system, we could understand a system that would be useful for industry or explaining natural processes. For example, the floatation process is similar to the one used to separate iron from ore. Air is added into a mixture in which a mineral, such as iron, will rise because bubbles attach themselves more easily to it, while other minerals sink to the bottom. The same process can also explain why volcano scientists find that the mineral magnetite rises to higher layers in Earth’s crust than expected.

1. When did Luiz Pereira first notice peanuts dancing in a glass of beer?
A.Early in his childhood.B.During one of his experiments.
C.On his way to study abroad.D.When he first threw peanuts into a glass of beer.
2. What causes the peanuts to float to the top of the beer?
A.Their special surface.B.The bubbles on their surface.
C.Their reaction with the beer.D.The bubbles existing at the bottom of the bottle.
3. What is mainly talked about the “beer-gas-peanut system” in the last paragraph?
A.Its feature.B.Its principle.C.Its process.D.Its significance.
4. What can be the best title for the text?
A.Why Peanuts “Dance” When Dropped in Beer
B.Brazilian Researchers Found Peanuts Dropped in Beer
C.The Function of CO2 in Beer
D.The Principle in Mineral Extraction
【知识点】 说明文 自然科学

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【推荐1】I was reading these interesting stories behind a group of great logos in the world. Personally Nike is my favorite one – it’s so simple. And I liked the stories behind them, which made me forget all other things. McDonald’s, Apple, Mercedes Benz and Adidas own great logos as well, and they are among my favorites.

Nike

In the Greek myth, Nike is the goddess of victory and the source of inspiration for soldiers. This logo represents the wing in the famous statue of the Greek goddess. Nike’s logo was designed by Carolyn Davidson in 1971 for $ 35, and was registered as a trademark in 1995.

McDonald’s

The logo was designed in 1962 by Jim Schindler to resemble the archshaped(拱形的) signs on the side of the company’s then walk-up hamburger stand. Later on, the two golden arches were combined together to form the M. The McDonald’s name was added to the logo in 1968.

Apple

There are different stories behind Apple’s logo. The first logo was a reference to the religious story of Adam and Eve, in which the apple represented the fruit of the Tree of Knowledge. One year later, the second logo was designed in 1977 by Steve Jobs and Ronald Wayne, and it described Sir Isaac Newton sitting under an apple tree. This logo didn’t stay long. One year later it was replaced almost immediately by graphic designer Rob Janoff’s “rainbow apple”, a rainbow-colored silhouette(轮廓)of an apple with a bite taken out of it. And then the rainbow-colored apple was replaced by the one-colored logo in 1998. It has not been changed so far.

Mercedes Benz

The Mercedes Benz logo, which was originally created by Gottlieb Daimler in 1909, consists of a simple description of a three-pointed star that represents its rule of the land, the sea and the air. The company was founded by Gottlieb Daimler and Wilhelm Maybach. Mercedes is the name of Maybach’s elder daughter, while Benz came as a result of a combination with Benz, Cie and DMG in 1926.

Adidas

The Adidas logo, which was created by the founder of the company Adi Dassler, represents mountains, pointing towards the challenges that are seen ahead and goals that can be achieved. The logo was used for the first time in 1967.

1. What does Nike’s logo stand for?
A.The goddess of victory.
B.The source of inspiration for soldiers.
C.The statue of the Greek goddess.
D.The wing of the Greek goddess.
2. We can learn that Apple’s present logo is ________.
A.the religious story of Adam and Eve
B.a bitten apple with only one color
C.Newton’s sitting under an apple tree
D.the rainbow-colored bitten apple
3. ________ stands for the rule of the land, the sea and the air.
A.Nike’s logoB.Apple’s logo
C.The Mercedes logoD.The Adidas logo
4. Which of the following time orders describes the births of the great logos?
A.Mercedes Benz – McDonald’s – Nike – Apple.
B.Nike – McDonald’s – Apple – Mercedes Benz.
C.Mercedes Benz – Apple – Nike –McDonald’s.
D.Nike –Mercedes Benz –McDonald’s – Apple,
2021-12-09更新 | 28次组卷
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名校
文章大意:本文是一篇说明文。这篇文章主要介绍了孤独及交友的问题。文章指出,每个人都会感到孤独,而想要交朋友就需要主动地去接触他人,并且要关心他人的需求。文章还提到了一些交友的措施,如主动接近感兴趣的人,关心孤独的人,以及避免问“是”或“否”的问题。

【推荐2】“I feel lonely and hopeless, ” said Lisa, a bright teenager from a loving home. “It seems that nobody wants to become my friend. What’s wrong with me?”

Like Lisa, many of us experience loneliness. The truth is that all people, no matter what their age or character-even the most outgoing, wealthy and popular-experience loneliness at least sometimes. It’s healthy and natural to want to be around people who care. After all, we’ve all heard “No man is an island.” That’s true. We all need others in our lives.

Solomon, the wisest man who ever lived, explains that if we want friends, we must be friendly and reach out to others. But it has risk. Because we are often afraid of rejection, many of us are unwilling to reach out to others. We take a safer way and wait for others to make friends with us. But if we want friends, we’ve got to get beyond this.

If making friends is your goal as well, you need to consider taking some measures.

Be willing to take the initiative (主动). If you see someone whom you would like to know, don’t wait for her to make the first move. Get close to her and begin a conversation. Let her know in a non-aggressive (无攻击性的) way that you are interested in being friends with her.

Reach out to those who are lonely. When you see someone at school sitting alone, go over and talk to her. And don’t let popularity decide whom you reach out to. You’ll often be surprised at the beautiful qualities behind a shy appearance. Ask questions. Start your first conversation by asking this possible friend what she likes to do or asking about her family. Be sure to ask questions that cannot be replied with “yes” or “no”. For example, don’t ask “Do you have a dog?” Instead, say “So, tell me about your pets. ” Avoiding asking “yes” or “no” questions makes your possible friend not end your communication with a one-word answer.

1. Why does the author begin the text with Lisa’s worry?
A.To set a sad tone.
B.To share Lisa’s pain.
C.To teach readers a lesson.
D.To introduce the topic.
2. What can be a risk caused by reaching out to others according to the passage?
A.Putting ourselves in danger.
B.Being treated in a rude way.
C.Being refused by others.
D.Losing interest in communicating.
3. What can we know from Paragraph 5?
A.Popular people are often easy-going.
B.Just waiting for chances will help you make friends.
C.Shy people are hard to talk to.
D.A suitable way is important in making friends.
4. Why does the author suggest not asking “yes” or “no” questions?
A.It is considered unfriendly.
B.It isn’t good for keeping a conversation going.
C.It will leave a bad first impression.
D.It shows the poor quality of the speaker.
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【推荐3】Nobody is sure where and when the expression “apple-pie order” began. Some say that Scottish and English writers used the expression a long time ago. Others say it first was used in the northeastern American states known as New England. The housewives of New England cut their apples in even slices. Then they filled pie pans with them in an organized way, row (排) upon row. As one writer said, the women of New England loved to have everything in its place. This perhaps explains why it generally is believed that the expression “apple-pie order” began in New England.

Another old expression, “apple of discord”, comes from ancient mythology (神话), however. The myth says that all the gods and goddesses were sitting around the table to celebrate the marriage of Thetis and Peleus. One of the goddesses—Discord—was a troublemaker. She threw a golden apple on the table to be given as a prize to the most beautiful goddess.

At one time, the tomato was called a love apple. That was a mistake. This is how the mistake happened: In the sixteenth century, Spain bought the tomato from South America after Spanish explorers had landed there. Spain then sold the tomato to Morocco. Italian traders carried it on to Italy. The Italian name for the tomato was “pomo di Moro”—apple of the Moors. When French growers brought it in from Italy, they thought “di Moro” meant “d’amour”—the French word for love. And so “pomo di Moro” became the apple of love.

People believe many things about the apple. One belief is that it has great power of keeping people healthy. A very common expression is “an apple a day keeps the doctor away”.

Another belief is based on fact. The expression is “one rotten apple spoils the barrel”. When an apple begins to go bad, it ruins all the other apples around it in the container. The expression has come to mean that one bad person in a group can cause everyone to behave badly.

1. What can be learned about the phrase “apple-pie order”?
A.It began in New England.
B.It has been put into use recently.
C.Everyone is sure of how it began.
D.No one knows for sure where and when it began.
2. What’s the meaning of “apple of discord”?
A.Cause of disagreement.B.Everything in good order.
C.Everything under control.D.Situation of danger.
3. What’s the purpose of the third paragraph?
A.To prove people’s love for tomatoes.
B.To tell us a love story about apple.
C.To explain how the tomato was called the apple of love.
D.To show how the tomato was brought in from South America.
4. Which of the following expressions is about health?
A.Apple-pie order.B.Apple of discord.
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