Few people can resist the lure (诱惑) of a delicious ice cream, especially on a hot day. The only thing that spoils the fun is that the treat is hard to enjoy slowly, often ending up with a sticky melted mess. Now, researchers from Colombia's Pontificia Bolivariana University may have found an unlikely partner to help solve this age-old problem---cellulose fiber(纤维素) extracted from banana plant waste. Bananas, as you probably know, grow in bunches on a tree-like plant. Each bunch is attached to a central stalk, called a rachis(叶轴), which is thrown once the fruit has been harvested. The team, led by Dr. Robin Zuluaga Gallego, began extracting cellulose nanofibrils (CNFS) from powdered rachis. The tasteless, odorless macro fibers, thousands of times smaller than the width of a human hair were then added in various concentrations to 100 grams of ice cream mix.
With the right amount of CNFS mixed in, the dessert lasted longer in its frozen state than conventional ice cream, extending both its shelf life and the amount of time the treat can be enjoyed. Even more exciting was that the fibers increased the stickiness of low-fat ice cream to levels higher than the full-fat one. Since this is what determines the frozen treats’ creaminess and texture, CNFS could help create healthier ice cream without compromising on taste.
The researchers, who presented their findings at the American Chemical Society (ACS) meeting in New Orleans on March 21, 2018, next plan to investigate how different types of fat, such as coconut oil, affect the behavior of CNFS in other frozen treats.
The Colombian researchers are not the only one working on creating a slower-melting ice cream. In 2015, scientists at the University of Dundee in Scotland found that a naturally occurring protein called BSIA(Bacterial Surface Layer A) was remarkably effective in keeping the treat frozen for longer periods of time. With both teams competing to be the first to get to market, the future of everyone’s favorite dessert certainly looks promising.
1.What prevents people enjoying an ice cream slowly?
A.The hot weather.
B.A kind of fiber from banana.
C.The ice creams’ stickiness.
D.The ice creams’ quick melting.
2.Which is NOT a benefit of CNFS added to ice cream mix?
A.To improve its flavor.
B.To make it more healthy.
C.To reduce its fat content.
D.To make it melt more slowly.
3.What can be inferred from the last paragraph?
A.CNFS are more useful and effective than BSLA.
B.Ice cream with BSLA has been on sale at the market.
C.Slowly enjoying an ice cream will soon become a reality.
D.The Colombian research team has taken the lead in the competition with the Scottish team.
4.What's the author’s attitude towards the finding of CNFS?
A.Positive B.Casual
C.Defensive D.Suspicious.
高二英语阅读理解中等难度题
Few people can resist the lure (诱惑) of a delicious ice cream, especially on a hot day. The only thing that spoils the fun is that the treat is hard to enjoy slowly, often ending up with a sticky melted mess. Now, researchers from Colombia's Pontificia Bolivariana University may have found an unlikely partner to help solve this age-old problem---cellulose fiber(纤维素) extracted from banana plant waste. Bananas, as you probably know, grow in bunches on a tree-like plant. Each bunch is attached to a central stalk, called a rachis(叶轴), which is thrown once the fruit has been harvested. The team, led by Dr. Robin Zuluaga Gallego, began extracting cellulose nanofibrils (CNFS) from powdered rachis. The tasteless, odorless macro fibers, thousands of times smaller than the width of a human hair were then added in various concentrations to 100 grams of ice cream mix.
With the right amount of CNFS mixed in, the dessert lasted longer in its frozen state than conventional ice cream, extending both its shelf life and the amount of time the treat can be enjoyed. Even more exciting was that the fibers increased the stickiness of low-fat ice cream to levels higher than the full-fat one. Since this is what determines the frozen treats’ creaminess and texture, CNFS could help create healthier ice cream without compromising on taste.
The researchers, who presented their findings at the American Chemical Society (ACS) meeting in New Orleans on March 21, 2018, next plan to investigate how different types of fat, such as coconut oil, affect the behavior of CNFS in other frozen treats.
The Colombian researchers are not the only one working on creating a slower-melting ice cream. In 2015, scientists at the University of Dundee in Scotland found that a naturally occurring protein called BSIA(Bacterial Surface Layer A) was remarkably effective in keeping the treat frozen for longer periods of time. With both teams competing to be the first to get to market, the future of everyone’s favorite dessert certainly looks promising.
1.What prevents people enjoying an ice cream slowly?
A.The hot weather.
B.A kind of fiber from banana.
C.The ice creams’ stickiness.
D.The ice creams’ quick melting.
2.Which is NOT a benefit of CNFS added to ice cream mix?
A.To improve its flavor.
B.To make it more healthy.
C.To reduce its fat content.
D.To make it melt more slowly.
3.What can be inferred from the last paragraph?
A.CNFS are more useful and effective than BSLA.
B.Ice cream with BSLA has been on sale at the market.
C.Slowly enjoying an ice cream will soon become a reality.
D.The Colombian research team has taken the lead in the competition with the Scottish team.
4.What's the author’s attitude towards the finding of CNFS?
A.Positive B.Casual
C.Defensive D.Suspicious.
高二英语阅读理解中等难度题查看答案及解析
Ice cream is certainly the world's favorite dessert. 1. Of all the people across the world, more ice cream is eaten in Australia than in any other country: 16.6 liters per person per year.
A form of ice cream was eaten in China about 4,000 years ago. 2. Sounds strange today.
Ice cream was brought to Europe in the 16th century, but at that time only the super-rich could afford it. When the Italian princess Catherine de Medici married the future King Henry Ⅱ of France in 1533, a different kind of ice cream was served every day a month! 3.
Ice cream was introduced to America in the 1700s, but mostly enjoyed by the wealthy. Around 1800, special ice houses were invented and ice cream became an American industry. 4. In 1946, they ate more than 20 liters of ice cream per person.
The world's most popular flavor is vanilla（香草）, which was produced from vanilla beans. 80% of the world's vanilla beans grew on the island of Madagascar, off the east coast of Africa. 5. And of all the days of the week, most ice cream is bought on Sunday!
A.Ice cream didn't become available to the ordinary people in France until 1660.
B.In Europe alone, about 11 billion dollars a year is spent on ice cream.
C.Americans celebrated the victory of World WarⅡwith ice cream.
D.California produces more ice cream than any other state.
E.More than 90 percent of the US families buy dessert.
F.It was made of milk rice, fruit and snow!
G.The most favorite topping is chocolate.
高二英语七选五中等难度题查看答案及解析
（题文）Between the two parts of the concert is an interval, ________ the audience can buy icecream.
A. when B. where
C. that D. which
高二英语单项填空中等难度题查看答案及解析
Between the two parts of the concert is an interval, __ the audience can buy ice-cream.
A．when B．where C．that D．which
高二英语单项填空简单题查看答案及解析
Between the two parts of the concert is an interval, ______ the audience can buy ice-cream.
A. when B. where C. that D. which
高二英语单项填空困难题查看答案及解析
Between the two lectures _____ a break, _______ the audience can buy ice cream.
A. is; when B. are; when C. are; which D. is; which
高二英语单项填空中等难度题查看答案及解析
The world, in painter Chen Xiao’s eyes, is as colorful and sweet as ice cream.
At the opening of his latest exhibition, Colorful World in the Eyes of Sean Chen, at the National Museum of China recently, the artist told his story.
Chen left China for Australia in 1986 to seek artistic freedom, and like many new immigrants（移民）then, he had little money in his pocket. To make ends meet, he drew portraits of people in the street.
Every day, he saw people buy ice cream from a shop. Chen couldn’t help wondering: “It must taste great, that’s why so many people buy it.” But he didn’t buy one for himself because he had to save money to support his studies. After four months of painting there and watching people eat ice cream, Chen didn’t resist the temptation（诱惑）--- he bought an ice cream. “The first bite took me to heaven,” Chen recalls while laughing. “You know, as a poor young man in a new country, an ice cream was too expensive then.” Since then, he kept the taste of the ice cream in his heart and included the happy feelings in his paintings, which turn out to be colorful and sweet.
His current exhibition is part of his nationwide tour that began at the National Art Museum of China in Beijing in 2011. He plans to take his artworks to 24 cities around China by 2016. The exhibition at the National Art Museum of China will last until April 22. After the exhibition tour, he will sell his works through an auction（拍卖会）, and all the money will be donated to protection of the environment in China. “The natural environment of New Zealand has inspired my artwork and brought me enjoyment. I hope people in my home country can enjoy the same beautiful environment as I do,” says Chen, who has made New Zealand his home for the last 26 years.
1.Why did Chen Xiao leave China for Australia in 1986?
A. To have an exhibition.
B. To seek artistic freedom.
C. To visit his friends.
D. To earn money.
2. What did Chen Xiao do to make ends meet?
A. He sold ice cream in a shop.
B. He drew portraits of people.
C. He worked with some new immigrants.
D. He sought help from people in the street.
3. How will Chen Xiao sell his works after the exhibition tour?
A. By advertising them. B. On the Internet.
C. Through an auction. D. Through shops.
4. What inspired Chen Xiao’s artwork?
A. The natural environment of New Zealand.
B. His experiences as an immigrant.
C. The exhibition tour.
D. His home country.
5.Which word can best describe Chen Xiao’s paintings?
A. Simple. B. Interesting.
C. Lovely. D. Colorful.
高二英语阅读理解中等难度题查看答案及解析
People are being lured (引诱)onto Facebook with the promise of a fun, free service without realizing they’re paying for it by giving up large amounts of personal information. Facebook then attempts to make money by selling their data to advertisers that want to send targeted messages.
Most Facebook users don’t realize this is happening. Even if they know what the company is up to, they still have no idea what they’re paying for Facebook because people don’t really know what their personal data is worth.
The biggest problem, however, is that the company keeps changing the rules. Early on, you keep everything private. That was the great thing about facebook—you could create your own little private network. Last year, the company changed its privacy rules so that many things— your city, your photo, your friends' names—were set, by default (默认)to be shared with everyone on the Internet.
According to Facebook’s vice-president Elliot Schrage, the company is simply making changes to improve its service, and if people don’t share information, they have a “less satisfying experience”.
Some critics think this is more about Facebook looking to make more money. Its original business model， which involved selling ads and putting them at the side of the page， totally failed. Who wants to look at ads when they’re online connecting with their friends?
The privacy issue has already landed Facebook in hot water in Washington. In April. Senator Charles Schumer called on Facebook to change its privacy policy. He also urged the Federal Trade Commission to set guidelines for social-networking sites.“I think the senator rightly communicated that we had not been clear about what the new products were and how people could choose to use them or not to use them,” Schrage admits.
I suspect that whatever Facebook has done so far to invade our privacy, it’s only the beginning, which is why I’m considering deactivating(撤销)my account. Facebook is a handy site, but I’m upset by the idea that my information is in the hands of people I don’t know. That’s too high a price to pay.
1.What do we learn about Facebook from the first paragraph?
A．It is a website that sends messages to targeted users.
B．It makes money by putting on advertisements.
C．It profits by selling its users’ personal data.
D．It provides loads of information to its users.
2.What does the author say about most Facebook users?
A．They are reluctant to give up their personal information.
B．They don’t know their personal data enriches Facebook.
C．They don’t identify themselves when using the website.
D．They care very little about their personal information.
3.Why does Senator Charles Schumer propose?
A．Setting guidelines for advertising on websites.
B．Banning the sharing of users’ personal information.
C．Working out regulations for social-networking sites.
D．Removing ads from all social-networking sites.
4.Why does the author plan to cancel his Facebook account?
A．He is dissatisfied with its current service.
B．He finds many of its users untrustworthy.
C．He doesn’t want his personal data to be used in a wrong way.
D．He is upset by its frequent rule changes.
高二英语阅读理解中等难度题查看答案及解析
People are being lured(引诱)onto Facebook with the promise of a fun and free service without realizing they’re paying for it by giving up large amounts of personal information. Facebook then attempts to make money by selling their data to advertisers that want to send targeted messages.
Most Facebook users don’t realize this is happening. Even if they know what the company is up to, they still have no idea what they’re paying for Facebook, because people don’t really know what their personal details are worth.
The biggest problem, however, is that the company keeps changing the rules. Early on, you could keep everything private. That was the great thing about Facebook—you could create your own little private network. Last year, the company changed its privacy rules so that many things—your city, your photo, your friends’ names—were set, by default(默认), to be shared with everyone on the Internet.
According to Facebook’s vice-- president Elliot Schrage, the company is simply making changes to improve its service, and if people don’t share information, they have a “less satisfying experience.”
Some critics think this is more about Facebook looking to make more money. Its original business model, which involved selling ads and putting them at the side of the page, totally failed. Who wants to look at ads when they’re online connecting with their friends?
The privacy issue has already landed Facebook in hot water in Washington. In April, Senator(议员) Charles Schumer called on Facebook to change its privacy policy. He also urged the Commission to set guidelines for social-networking sites. “I think the senators rightly communicated that we had not been clear about what the new products were and how people could choose to use them or not to use them,” Schrage admits.
I suspect that whatever Facebook has done so far to invade our privacy, it’s only the beginning, which is why I’m considering deactivating(撤销)my account. Facebook is a handy site, but I’m upset by the idea that my information is in the hands of people I don’t know. That is too high a price to pay.
1.What do we learn about Facebook from the first paragraph?
A. It is website that sends messages to targeted users
B. it makes money by putting on advertisements
C. It provides loads of information to its users
D. It profits by selling its users’ personal data
2.Why does Facebook make changes to its according to Elliot Schrage?
A. To provide better service to its users B. To follow the Federal guidelines
C. To improve its users’ connectivity D. To expand its scope of business
3.What does Senator Charles Schumer advocate(主张)?
A. Setting guidelines for advertising on websites
B. Banning the sharing of users’ personal information
C. Removing ads from all social—networking sties
D. Formulating (制订)regulations for social—networking sties
4.Why does the author plan to cancel his Facebook account?
A. He is dissatisfied with its current service
B. He doesn’t want his personal data abused
C. He finds many of its users untrustworthy
D. He is upset by its frequent rule changes
高二英语阅读理解中等难度题查看答案及解析
Homemade Ice Cream in a Bag
Difficulty: Very Easy
Average User Rating:★★★★☆(4.3/5)
Milk can become homemade ice cream in five minutes by using a bag! This homemade, creamy treat is a summertime delight for your kids and you alike.
What you’ll need:
1 tablespoon of sugar; 1/2 cup of milk; 1/4 teaspoon of vanilla (香草香精); 6 tablespoons of rock salt; 1 small-sized plastic food storage bag; 1 gallon-sized plastic food storage bag; ice cubes.
How to make it:
l Fill the large bag half full of ice, and add the rock salt. Seal the bag.
l Put milk, vanilla, and sugar into the small bag, and seal it.
l Place the small bag inside the large one, and seal it again carefully.
l Shake until the mixture turns into ice cream, which takes about five minutes.
l Wipe the top of the small bag, and then open it carefully. Enjoy!
Tips:
1/2 cup of milk will make about one spoon of ice cream, so double the recipe if you want more. But don’t increase the amount more than that—a large amount might be too big for kids to pick up because the ice itself is heavy.
Here is another version of the homemade ice cream recipe from another parent!
These are the homemade ice cream ingredients:
1/4 teaspoon of vanilla butter and nuts; 1 tablespoon of sugar; 1/2 cup of milk.
These are the other supplies:
Plastic sandwich bag; 12 salt pellets; 1 dish of ice; large plastic bag.
Put the ice cream ingredients in the small bag, and then put the bag, salt and ice in the big bag. Hold the bag shut and move it around on the floor for about 5 minutes.
When I made ice cream at home last time, although the salt pellets didn’t really dissolve (溶解) that well, I still got ice cream. It was not smooth ice cream, probably because of the low-fat milk. It was incredible that it could be ready in 5 minutes (not counting preparing the ingredients)
Next, I changed the recipe, using a tablespoon of cocoa, a tablespoon of sugar, and a cup of milk. It was a bit too chocolaty, but good!
1.The underlined “that” in “Tips” section refers to ____.
A．1/2 cup of milk B．1 cup of milk
C．1 spoon of ice cream D．2 spoons of ice cream
2.Which of the following things is NOT included in both recipes?
A．Sugar B．Ice C．Plastic bag D．Nuts
3.Which of the following statements about the second parent is TRUE?
A．He/ She doesn’t agree with the first parent.
B．He/ She doesn’t think five minutes is enough
C．He/ She doesn’t like cocoa better than nuts.
D．He/ She doesn’t think the chocolaty tastes bad.
高二英语阅读理解中等难度题查看答案及解析