Few people can refuse a delicious ice cream, especially on a hot day. The only thing that stops the fun is that the treat is hard to enjoy slowly, ending up with a sticky, melted mess. Now, researchers from Colombia’s Pontifical Bolivarian University may have found an unlikely thing to help solve this age-old problem — a kind of fibre from banana plant waste.
Bananas, as you probably know, grow in groups on a tree-like plant. Each group is connected to a central rachis (叶轴), which is thrown once the fruit has been gathered. The team, which was led by Dr. Robin Zuluaga Gallego, began by abstracting /drawing out cellulose nanofibrils (CNFs) from the powdered rachis. The tasteless fiber, thousands of times smaller than the width of a human hair, was then added to 100 grams of ice cream mix.
With the right amount of CNFs mixed in, the dessert lasted longer in its frozen state than the traditional ice cream, extending the amount of time that the treat can be enjoyed. What was even more exciting was that the fibre increased the stickiness of the low-fat ice cream to levels higher than the full-fat one. Since this is what determines the frozen treat’s creaminess and taste, CNFs could help create the healthier ice cream without influencing the taste of it.
The researchers, who presented their findings at the American Chemical Society( ACS) meeting in New Orleans in March, 2018, next plan to study how different types of fat, such as coconut oil, influence the behaviour of CNFs in other frozen treats.
The Colombian researchers are not the only ones working on creating a slower-melting ice cream. In 2015, scientists at the University of Dundee in Scotland found that a natural protein called BsIA was very effective in keeping the treat frozen for longer periods of time. With both teams fighting to be the first to get to the market, the future of everyone’s favorite dessert certainly looks bright.
1.What prevents people enjoying an ice cream slowly?
A.A kind of fibre from bananas.
B.The ice cream’s quick melting.
C.The ice cream’s stickiness.
D.The fat in the ice cream.
2.Why were CNFs added to ice cream mix?
A.To improve its taste.
B.To increase its stickiness.
C.To reduce its fat content.
D.To make it melt more slowly.
3.What does the underlined word “it” in Paragraph 3 refer to?
A.The ice cream. B.The fiber.
C.The fat. D.The stickiness.
4.What can be inferred from the last paragraph?
A.BsIA is popular in the market.
B.CNFs are more useful and expensive than BsIA.
C.Ice creams with CNFs have been on sale at the market.
D.Slowly enjoying an ice cream will soon become a reality.
高三英语阅读理解中等难度题
Few people can refuse a delicious ice cream, especially on a hot day. The only thing that stops the fun is that the treat is hard to enjoy slowly, ending up with a sticky, melted mess. Now, researchers from Colombia’s Pontifical Bolivarian University may have found an unlikely thing to help solve this age-old problem — a kind of fibre from banana plant waste.
Bananas, as you probably know, grow in groups on a tree-like plant. Each group is connected to a central rachis (叶轴), which is thrown once the fruit has been gathered. The team, which was led by Dr. Robin Zuluaga Gallego, began by abstracting /drawing out cellulose nanofibrils (CNFs) from the powdered rachis. The tasteless fiber, thousands of times smaller than the width of a human hair, was then added to 100 grams of ice cream mix.
With the right amount of CNFs mixed in, the dessert lasted longer in its frozen state than the traditional ice cream, extending the amount of time that the treat can be enjoyed. What was even more exciting was that the fibre increased the stickiness of the low-fat ice cream to levels higher than the full-fat one. Since this is what determines the frozen treat’s creaminess and taste, CNFs could help create the healthier ice cream without influencing the taste of it.
The researchers, who presented their findings at the American Chemical Society( ACS) meeting in New Orleans in March, 2018, next plan to study how different types of fat, such as coconut oil, influence the behaviour of CNFs in other frozen treats.
The Colombian researchers are not the only ones working on creating a slower-melting ice cream. In 2015, scientists at the University of Dundee in Scotland found that a natural protein called BsIA was very effective in keeping the treat frozen for longer periods of time. With both teams fighting to be the first to get to the market, the future of everyone’s favorite dessert certainly looks bright.
1.What prevents people enjoying an ice cream slowly?
A.A kind of fibre from bananas.
B.The ice cream’s quick melting.
C.The ice cream’s stickiness.
D.The fat in the ice cream.
2.Why were CNFs added to ice cream mix?
A.To improve its taste.
B.To increase its stickiness.
C.To reduce its fat content.
D.To make it melt more slowly.
3.What does the underlined word “it” in Paragraph 3 refer to?
A.The ice cream. B.The fiber.
C.The fat. D.The stickiness.
4.What can be inferred from the last paragraph?
A.BsIA is popular in the market.
B.CNFs are more useful and expensive than BsIA.
C.Ice creams with CNFs have been on sale at the market.
D.Slowly enjoying an ice cream will soon become a reality.
高三英语阅读理解中等难度题查看答案及解析
—The ice cream is really delicious. Can I have some more?
—________.
A．Behave yourself B．Please yourself
C．Do it yourself D．Be my guest
高三英语单项填空中等难度题查看答案及解析
(2013·辽宁五校第一联合体高三考试)—The ice cream is really delicious. Can I have some more?
—________.
A．Behave yourself B．Please yourself
C．Do it yourself D．Be my guest
高三英语单项填空中等难度题查看答案及解析
For many people, the name Baskin-Robbins is linked to sweet memories of eating ice cream．Irvine Robbins, who helped create this famous company, died in May at the age of ninety．His life's work of making fun and exciting ice cream flavors changed the way Americans enjoy this food．
Irvine Robbins opened his first ice cream store in 1945 in California．At the time, there were no stores that sold only ice cream．His sister's husband, Burton Baskin, also opened his own ice cream stores．
In 1948 they combined their six stores into one business．Baskin and Robbins realized that they were too busy to operate each store well．So, they decided to sell part of each operation to the manager of that store．This permitted the company to grow quickly．
By 1953, they renamed their company Baskin-Robbins．They advertised that they sold 31 kinds of ice cream to show the many choices buyers had．There was one flavor for every day of the month．
Robbins and Baskin sold "Lunar Cheesecake" the day after astronauts landed on the moon in 1969．Other flavors included "ChaChaCha", for cherry chocolate chip, and Robbins' personal favorite "Jamoca Almond Fudge"．They said: "We sell fun, not just ice cream．"
By 1967, there were 500 Baskin-Robbins stores in the United States．The business partners sold their company that year．Today, there are more than 5,800 Baskin-Robbins stores around the world．
1.What is the main idea of the passage?
A．The managers of Baskin-Robbins． B．The start of Baskin-Robbins．
C．The production of Baskin Robbins． D．The great success of Baskin-Robbins．
2.From the text we learn that _____．
A．Baskin-Robbins was the only shop selling ice cream in 1945
B．Baskin-Robbins was famous for their special ice cream flavors
C．Baskin-Robbins grew quickly because they combined their other stores together
D．there had been more than 5,800 Baskin-Robbins stores around the world by 1967
3.What was probably the main reason for Baskin-Robbins' success?
A．They sold not only ice cream, but fun．
B．They renamed their company．
C．They put all their hearts into the business．
D．They sold "Lunar Cheesecake"．
4.It can be inferred from Paragraph 5 that
A．Jamoca Almond Fudge is Baskins' favorite
B．Cherry chocolate chip sells best
C．Robbins and Baskin were good at inventing new ice creams
D．Lunar cheesecake was invented for the astronauts
高三英语阅读理解中等难度题查看答案及解析
Ice cream can’t cure cancer or bring back a lost love, but it can make one feel better for a while.
A bout 18 months ago, my father was in hospital recovering from a major lung operation. My mother had recently36 , and my father had taken the loss of his partner of 55 years very hard and had lost interest in 37 . Trying to get him to38 each day was quite a chore as he didn’t want anything. The one thing,39 , that he would ask us to bring him was ice-cream.
One evening, to our 40 , he refused to eat the ice-cream,41 I placed it in a staffroom freezer. A little while later, my son decided he wanted it, so I 42 it for him.
As I passed another ward（病房）, a 43 asked, “Are there more where that came from?” When I explained the 44 , she apologized. She then said that she had cancer and could eat very little,45 the occasional ice-cream.
The next evening, I decided to buy two ice-creams. On the way to Dad’s room, I stopped in at the 46 woman’s room, and 47 her the ice-cream I’d bought for her. She was 48 stunned that I had thought of her, and 49 the gift with tears in her eyes. I spoke with her for a few minutes,50 what was happening in my family and listened to her 51 story of pain and suffering. It was apparent that she did not 52 many visitors, and the ice-cream and our short chat meant a great deal to her.
I 53 the gesture a few days later, and this time was 54 with a huge hug.
I never even thought to ask her name, and never saw her again, but it made me realize that an act of 55 can be more rewarding when you give it, rather than receive it.
1.A．passed away B．gone out C．come back D．calmed down
2.A．work B．life C．studies D．games
3.A．speak B．laugh C．drink D．eat
4.A．though B．however C．instead D．therefore
5.A．joy B．satisfactionC．surprise D．relief
6.A．if B．unless C．so D．because
7.A．borrowed B．bought C．made D．fetched
8.A．woman B．granny C．girl D．child
9.A．question B．situation C．process D．decision
10.A．better than． B．more than C．rather than D．other than
11.A．pretty ' B．honest C．sick D．shy
12.A．offered B．told ． C．sold D．charged
13.A．hardly B．finally C．gradually D．totally
14.A．accepted B．stored C．exchanged D．gave
15.A．remembering B．denying C．explaining D．forgetting
16.A．ordinary ' B．similar C．interesting D．i'great
17.A．have B．like C．expect D．J attract
18.A．reported B．expressed C．noticed D．^repeated
19.A．covered B．connected C．rewarded D．filled
20.A．politeness B．kindness C．selflessness D．willingness
高三英语完型填空中等难度题查看答案及解析
Sometimes, you just can’t say no to another spoonful of ice cream and maybe one more after that. Why not? You deserve it.
There’s no need to beat yourself up about it later. The truth is that you were probably bound to do that from the very first spoonful. That’s because there is a switch in your brain, and for whatever reason, it can get stuck in the “on” position.
According to a new study, this impulse (冲动) control may come down to a very specific circuit (回答) in the brain which occasionally produces melanin-concentrating hormone, or MCH—a chemical linked with our desire for food or drugs. And that circuit always says yes.
By manipulating this circuit, it is possible that we might be able to develop cures for overeating that help people stick to a diet without reducing normal appetite or making delicious foods like donuts less delicious.
For their research, the scientists treated rats to a self-serve buffet. Bur the treats were on a timed delivery system, making tasty food every 20 seconds, and only when a rat pressed a lever (杠杆). Hit that lever too early—as impatient test subjects occasionally did—and the counter would start from scratch. Lever-happy rats would have to wait another cycle before the food became available again.
A second experiment offered the rats two dining options. Push Lever A and get an immediate small reward. Pushing Lever B meants waiting for around40 seconds, but the food reward would be much bigger. Guess which lever those impatient rats were most food of? That’s right. They picked the now-now-now switch.
Their impulsiveness, however, rose sharply when scientists gave the rats MCH. These animals become more impulsive. MCH, it seemed, could talk rats into loosening its inhibitions (拘束). The result? More please.
Researchers can now see where that conversation between the brain’s reward system and its impulse control center takes place. The next step will be to map it—and potentially influence the discussion. It may eventually be possible to control a food-eating impulse.
1.Which of the following can best replace the underlined word “manipulating” in paragraph 4?
A.Strengthening. B.Controlling.
C.Classifying. D.Creating.
2.What would happen when a rat pressed a lever earlier than the fixed time?
A.A bigger food reward would appear.
B.Tasty food would be delivered much sooner.
C.Longer time would be needed for food to appear.
D.The lever would be stopped form delivering food.
3.Why did the researchers conduct the experiments?
A.To find out the effect of MCH on animals.
B.To prove rats are also greedy for more food.
C.To study how levers influence rats’ impulse.
D.To show rats and humans have similar impulse for food.
4.What is the best title for the text?
A.What Is the Effect of Your Impulse?
B.What Can You Do to Resist More Food?
C.Why Can’t You Say “No” to Your Impulse?
D.Why Do You Always Give in to One More Mouthful?
高三英语阅读理解困难题查看答案及解析
Between the two parts of the concert is an interval, ________the audience can buy ice – cream.
A．when B．where C．that D．which
高三英语单项填空困难题查看答案及解析
Between the two parts of the concert is an interval, ________ the audience can buy icecream.
A.when B.where
C.that D.which
高三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
高三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
高三英语单项填空中等难度题查看答案及解析