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题型:阅读理解-阅读单选 难度:0.4 引用次数:101 题号:15666625

Despite earning more than $100,000 in household income, many people feel that they are living month to month and that a loss of employment or sudden medical emergency could easily move them from the upper middle class to low income earners. This feeling of being on the “edge” of poverty, despite these levels of income, seems a bit ridiculous but it really comes down to easy credit, misunderstanding of their incomes and peer (同辈) group pressures.

Even in today’s tough economy, for those with six-figure incomes credit is easy to come by. Credit companies may have cut back offerings to those in lower income brackets(等级) due to the recent credit reforms, but there seems to be little or no effect on high income earners. Their being able to get credit without difficulty gives them a false sense of security that makes them spend way more than their incomes can afford. That’s why they accumulate credit card debt faster than average.

Many higher income earners feel like they are making lots of money now, and believe that they will continue to make big money. This may reduce their feeling that they need to watch their money carefully now. Hand in hand with that, many of them probably believe that they are making more money than they really are—or said another way, the money they make will go farther than it really does.

Meanwhile, many young professionals who are earning good incomes don’t come from particularly privileged backgrounds, and their reference point may be that they are making twice (or more) than their parents were—so they spend like that us well. They don’t take account of the effect of inflation(通货膨胀), which means that the cost of living is much higher than that in their parents’ generation. Further, the more you earn, the more you pay in tax. Rather than focusing on after-tax incomes, many high income earners only look at the top figures. A $100,000 income before tax is only about $70,000 after tax.

1. Who is the text centered on?
A.The upper middle class.B.Hie lower income group.
C.People living in poverty.D.People getting into debt.
2. What causes some people to spend beyond their income according to the text?
A.The effect of inflation.B.Easy availability of credit.
C.The good economic climate.D.Their privileged backgrounds.
3. What does the author intend to remind young professionals about in the end?
A.They should focus on their top line figures.
B.They need to look ahead rather than look back.
C.They actually don’t earn as much as they think.
D.They should form good personal financial habits.
4. Which of the following might be discussed in the next paragraph?
A.Effects of peer group pressures.B.Ways to keep financial stability.
C.Harm of poor money management.D.Tips on reducing the risk of poverty.

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文章大意:本文是一篇说明文。文章介绍一研究中,研究人员发现当人们休息时,大脑可能会重放学习新技能的记忆。

【推荐1】In a recent study of healthy volunteers, National Institutes of Health researchers discovered that our brains may replay memories of learning new skills when we rest.

NIH researchers have mapped out the brain activity that flows when we learn a new skill, such as playing a new song on the piano, and found that during short rest the volunteers’ brains rapidly and repeatedly replayed faster versions of the activity seen while they practiced typing a code. The more a volunteer replayed the activity the better they performed during subsequent practice sessions.

The study was conducted at the NIH Clinical Center. The team of Dr. Cohen, M.D. , senior investigator at the NIH’s National Institute of Neurological Disorders and Stroke (NINDS), used a highly sensitive scanning technique to record the brain waves of 33 healthy, right-handed volunteers as they learned to type a five-digit test code with their left hands. The subjects sat in a chair and under the scanner’s long, cone-shaped cap. An experiment began when a subject was shown the code “41234” on a screen and asked to type it out as many times as possible for 10 seconds and then take a 10 second break. Subjects were asked to repeat this cycle of alternating (交替的) practice and rest sessions a total of 35 times.

During the first few trials, the speed at which subjects correctly typed the code improved dramatically and then leveled off around the 11th cycle. In a previous study, Dr. Cohen’s team showed that most of these gains happened during short rests, and not when the subjects were typing. Moreover, the gains were greater than those made after a night’s sleep and were related with a decrease in the size of brain waves, called beta rhythms. In this new report, the researchers searched for something different in the subjects’ brain waves.

“We wanted to explore the mechanisms (机制) behind memory strengthening seen during wakeful rest. Several forms of memory appear to rely on the replaying of neural (神经的) activity, so we decided to test this idea out for procedural skill learning,” said Ethan R. Buch, Ph.D., a staff scientist on Dr. Cohen’s team and leader of the study. To do this, Dr. Buch developed a computer program which allowed the team to understand the brain wave activity associated with typing each number in the test code.

Interestingly, they found that the more a volunteer replayed, the better their performance was. “We were a bit surprised by these last results. Overall, our results support the idea that the replay activity during waking rest may be a powerful tool that researchers can use to help individuals learn new skills faster and possibly facilitate recovery from stroke.” said Dr. Cohen.

1. What have NIH researchers recently found?
A.The brain activity slowly flows when we learn a new skill.
B.The value of short practice sessions can’t be overestimated.
C.Short rest makes no difference to the neural replay of the activity.
D.The frequency of brain replay contributes to practice performances.
2. What is mainly talked about in Paragraph 3?
A.The process of the research.
B.The facilities of the research.
C.The application of the research.
D.The preparations of the research.
3. Why did Dr. Buch develop a computer program?
A.To distinguish the first 11 cycles from the later ones.
B.To confirm the role of neural replay in skill learning.
C.To explore the potential effects of procedural learning.
D.To find out the reasons for the changes in brain waves.
4. What does Dr. Cohen think of the research findings?
A.Acceptable.
B.Promising.
C.Shallow.
D.Dismissive.
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【推荐2】Dry ice is carbon dioxide in frozen form, with a temperature of about -78.3℃.     1     Instead, when dry ice melts, it turns into a gas. So when you see dry ice “smoking”, it’s frozen carbon dioxide melting into its gaseous state. Dry ice is a popular matter in science experiments and for a good reason. It creates projects that look cool.

Experiment: Healthy Dry Ice Yogurt Popsicles (冰棍)

This dry ice experiment is a simple project, but it’s certainly wonderful.     2     Even kids as young as five will at least appreciate the observations. It should take you about 10 minutes or less to have a frozen treat to enjoy.

Materials

One large block of dry ice

Large spoon or tube-shaped piece of metal

Four Popsicle sticks

One cup of your favorite juice

Tall glass filled with water

Directions

Use the large spoon, or tube-shaped piece of metal to make a Popsicle-shaped hole in the middle of the block of dry ice. You can set the ice on a towel on your counter to do this work.     3    

Add a Popsicle stick to the middle of the space so that when you pour in the liquid, it will freeze around the Popsicle stick.

    4     After several minutes, remove the Popsicle from the block of dry ice and dip it into a tall glass of water. Do this to warm up the Popsicle just a bit first.     5     You are sure to succeed!

A.Prepare all the necessary materials.
B.Otherwise, it will be too cold to enjoy.
C.It has appeal to a wide range of audiences.
D.Unlike regular ice, dry ice doesn’t melt into a liquid.
E.Keep in mind that it’s okay if it’s not exactly Popsicle-shaped.
F.The number of experiments you can perform using dry ice is endless.
G.Hold the Popsicle stick in place and wait a few minutes for your Popsicle to harden.
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【推荐3】An oval-shaped (椭圆形) structure, which is believed to be 121meters across, is shown in a picture of Antarctica.

Some say the structure is evidence that human civilization once lived in the South Pole, while others say it may be a natural phenomenon.

“What if, in the distant past, an ancient civilization developed in Antarctica, creating splendid structures and temples there?” Peter Turney says in a post on Ancient Code.

The post says scientists first thought the discovery could be a sastrugi (雪面波纹)一a natural phenomenon formed by years of battering (磨损) by strong, freezing winds and heavy snowfalls. But sastrugi are not known to form in oval shapes.

This is not the first time people have suggested there was a lost civilization in Antarctica.

Ever since last year, some people have been claiming (声称) that a strange pyramid in the Antarctic has appeared.

A video posted on YouTube by Third Phase of the Moon, a YouTube channel, showed a picture of a pyramid-like structure in the snow. Responses to the picture were varied, with some users backing-up the claims, such as James Jason, who commented: “Excellent report by Third Phase!I also believe things are about to get very dramatic (戏剧性的),and that is for everyone on our planet.”

Ashoka Tripathi from the University of Calcutta said the pictures showed clear evidence of an ancient human settlement beneath the ice sheet. “These are clearly characteristics of some sort of human-made structure, like some sort of pyramidal structure,” he said. “The patterns clearly show nothing we should expect from nature. We clearly have evidence of human engineering here,” John Emerson, his colleague, added.


But others were against it, such as Gordon Anderson, who said, “I have spent a lot of time on snow covered mountains—skiing down, and this looks natural to me—not man made anyway!”
1. What makes Peter Tumney believe in human civilization in Antarctica?
A.The ice sheet.
B.A heavy snowfall.
C.A big sastrugi.
D.An oval-shaped structure.
2. What is Third Phase of the Moon?
A.A picture.
B.A person.
C.A channel.
D.A video.
3. Who thinks the pyramidal structure is natural?
A.James Jason.
B.Ashoka Tripathi.
C.John Emerson.
D.Gordon Anderson.
4. Which of the following might be the best title for the text?
A.Antarctica, a possible land of civilization
B.South Pole, a splendid place to live in
C.Evidence of a newly-found planet
D.An excel lent post on Ancient Code
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