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题型:阅读理解 题类: 难易度:普通

外研版(2019) 选择性必修 第三册 Unit 5 Learning from nature 分层跟踪检测

 阅读理解

With the summer heat becoming increasingly unbearable over the years due to climate change,the cooling load in the summertime has also been on the rise.Insulation(隔热) is currently the main solution for blocking heat from entering a building,but by applying an additional material that can delay heat penetration(渗透),it can prevent the indoor temperature from rising and in turn lower the cooling load of the building.

A research team in Korea has developed a new material for building walls that can help reduce the penetration of heat from the outside.The team directed by Dr.Sarng Woo Karng from KIST revealed that they have successfully done it through building walls by applying a phase change material(PCM).One of the most common types is paraffin oil,which is used to make candles.

A solid PCM absorbs heat as it transforms into a liquid phase,so by using a case to hold it when it is in a liquid phase without causing any leakage(渗漏),it is possible to apply them to a building wall to block heat from entering inside.

The problem,however,is that the PCM turns into liquid starting from the outermost layer,and the parts that are hot move upward,while the parts that are still relatively cool move downward.Thus,while the upper part may have completely melted,the lower part will have not,and as a result,heat will penetrate into the building through the area where the PCM is in a liquid phase.In the end,the PCM becomes ineffective in controlling the indoor temperature and is rendered useless.

Dr.Karng's team addressed the non-uniform phase change with bubble injections.Injecting bubbles into the bottom part of the PCM enabled uniform circulation(流动)of the PCM in a liquid phase.Dr.Karng said,"We expect that the insulating wall using the PCM bubble generator used in this study will contribute to reducing the amount of energy used to heat or cool a building.Insulation techniques using the PCM help reduce heat penetration,in combination with the building insulating material,and it can also be used as the outer walls of zero-energy buildings."

(1)、What kind of function do PCMs serve according to the text?
A、Lowering heat penetration. B、Making the walls stronger. C、Being used to make candles. D、Perfecting the building walls.
(2)、Why is a case used when the PCM is in a liquid phase?
A、To test its effect. B、To avoid the risks. C、To block the heat. D、To stay in shape.
(3)、What can we infer about insulation techniques using PCMs?
A、They are imperfect. B、They are ineffective. C、They are low-cost. D、They are environmentally friendly.
举一反三
阅读理解

    Being a volunteer brings me happiness. I work with Volunteers for Wildlife, a rescue and education organization at Bailey Arboretum in Locust Valley. Trying to help injured, displaced or sick animals can be heartbreaking; survival is never certain. However, when it works, it is simply beautiful.

    I got a rescue call from a woman in Muttontown. She had found a young owl(猫头鹰) on the ground. When I arrived, I saw a 2­ to 3­week­old owl. It had already been placed in a carrier for safety.

    I examined the chick(雏鸟) and it seemed fine. If I could find the nest, I might have been able to put it back, but no luck. My next work was to build a nest and settle it in a tree.

    The homeowner was very helpful. A wire basket was found. I put some pine(松树) branches into the basket to make this nest safe and comfortable. I placed the chick in the nest, and it quickly calmed down.

    Now all that was needed were the parents, but they were absent. I gave the homeowner a recording of the hunger screams of owl chicks. These advertise the presence of chicks to adults; they might also encourage our chick to start calling as well. I gave the owner as much information as possible and headed home to see what news the night might bring.

    A nervous night to be sure, but sometimes the spirits of nature smile on us all! The homeowner called to say that the parents had answered to the recordings. I drove over and saw the chick in the nest looking healthy and active. And it was accompanied in the nest by the greatest sight of all—LUNCH! The parents had done their duty and would probably continue to do so.

阅读理解

    Blue Planet II's latest episode focuses on how plastic is having a disastrous effect on the ocean and slowly poisoning our sea creatures. Researchers recently also found that sea creatures living in the deepest place on Earth, the Mariana Trench, have plastic in their stomachs. Indeed, the oceans are drowning in plastic.

    Though it seems now that the world couldn't possibly function without plastics, consumer plastics are a remarkably recent invention. The first plastic bags were introduced in the 1950s; the same decade that plastic packaging began gaining in popularity in the United States. This growth has happened so fast that science is still catching up with the change. Plastics pollution research, for instance, is still a very early science.

    We put all these plastics into the environment and we still don't really know what the outcomes are going to be. What we do know, though, is disturbing. Ocean plastic is estimated to kill millions of marine animals every year. Nearly 700 species, including endangered ones, are known to have been affected by it. One in three leatherback turtles, which often mistake plastic bags for jellyfish, have been found with plastic in their bellies. Ninety percent of seabirds are now eating plastics on a regular basis. By 2050, that figure is expected to rise to 100 percent.

    And it's not just wildlife that is threatened by the plastics in our seas. Humans are consuming plastics through the seafood we eat. I could understand why some people see ocean plastic as a disaster, worth mentioning to the same degree as climate change. But ocean plastic is not as complicated as climate change. There are no ocean trash deniers (否认者), at least so far. To do something about it, we don't have to remake our planet energy system.

This is not a problem where we don't know what the solution is. We know how to pick up garbage. Anyone can do it. We know how to dispose (处理) of it. We know how to recycle. We can all start by thinking twice before we use single—use plastic products. Things that may seem ordinary, like using a reusable bottle or a reusable bag—when taken collectively, these choices really do make a difference.

阅读理解

    Kang Sung-il buys Sancho, his Pomeranian, a toy every business trip and this lunar New Year holiday will dress him up in s new $50 suit to visit 'grandma', Kang's mother. Kang and his wife say children are too expensive and bring too much pressure. Instead they have chosen to shower Sancho with love and gifts.

    They are not alone. South Korea's pet industry is booming, fuelled by the same factors that have made the country's birth rate, at 1.05 births per woman, the lowest in the world: the high cost of education and housing as well as extremely long working days.

    "Social pressures in South Korea are such that parents are required to provider resources for decades from private schooling to art classes," said Kang a 39 year old manager of a pet funeral home.

    On top of education expenses, an average and household must budget roughly 12.8 years of income to buy a mid-range home, compared to 8.8 years in 2014, data from KB Kookmin Bank shows. Adding to their stress, south Koreans work the third most hours per year among OECD (经合组织) nations, next only to Mexico and costa Rica.

    Pet-owning households have rose to 28 percent of all South Korean households in 2018, compared with 18 percent in 2012, government data shows.

    That in turn has resulted in a prosperous pet care industry whose offerings include tailored pet diets and high-priced photo shoots. Pet-related startup s are also popular with venture capitalists. The south Korean pet-related industry was worth 2.7 trillion won ($2.4 billion) last year, and that could more than double in size by 2027, according to the Korean Rural Economic Institute.

阅读理解

What a Messy Desk Says About You

    For some time, psychologists have been studying how personality traits affect health and health-related choices. Not surprisingly, they have found that people blessed with innate conscientiousness, meaning that they are organized and predictable, typically eat better and live longer than people who are disorderly. They also tend to have immaculate offices.

    What has been less clear is whether neat environments can produce good habits even in those who aren't necessarily innately conscientious. To find out, researchers at the University of Minnesota conducted a series of experiments. In the first experiment, they randomly assigned a group of college-age students to spend time in two office spaces, one of which was very neat, the other wildly cluttered (乱堆) with papers and other work-related stuff. The students spent their time filling out questionnaires unrelated to the study. After 10 minutes, they were told they could leave with an apple or a chocolate bar. Those students who sat in the orderly office were twice as likely to choose the apple as those who sat among the mess.

    A second experiment, however, found that working in chaos has its advantages, too. In this one, college students were placed in a messy or a neat office and asked to dream up new uses for Ping-Pong balls. Those in messy spaces generated ideas that were significantly more creative, according to two independent judges, than those in offices where stacks of papers and other objects were neatly arranged.

    The results were something of a surprise, says Dr. Vohs, the leader of the study. Few previous studies found much virtue in disorder. The broken window theory, proposed decades ago, holds that even slight disorder and neglect can encourage indifference and poor discipline.

    But in the study by Dr. Vohs, disordered offices encouraged originality and a search for novelty. In the final portion of the study, adults were given the choice of adding a health "boost" to their lunchtime smoothie that was labeled either "new" or "classic." The volunteers in the messy space were far more likely to choose the new one; those in the tidy office generally chose the classic version. "Disorderly environments seem to inspire breaking free of tradition," Dr. Vohs and her co-authors conclude in the study, "which can produce fresh insights."

    The implications of these findings are also practical. "My advice would be, if you need to think outside the box for a future project", Dr. Vohs says, "then let the clutter rise and free your imagination. But if your primary goal is to eat well or to go to the gym, pick up around your office first. By doing this, the naturally messy can acquire some of the discipline of the conscientious."

阅读理解

    Imagine someone who has spent the majority of their life sitting with a sign on the side of the road and that very person giving someone their last 20 dollars. That's exactly what Marine Corps veteran (退伍军人) Johnny Bobbitt, 34, did in October in Philadelphia.

    Bobbitt served in the U.S. Marine Corps and worked as a paramedic (医务辅助人员) in Vance County, N. C. before he became homeless. Nobody knew how he got to where he was because he was discreet about that.

    One night in October, Bobbitt was sitting roadside with a sign in Philadelphia as usual, when Kate McClure of Florence Township, N. J. was driving home down Interstate 95 and ran out of gas. Scared and nervous, she got out of the car to head to the nearest gas station. As McClure was heading to the nearest gas station, she ran into Bobbitt and he told her to get back in the vehicle and lock the door. Minutes later, he appeared with a red gas can. He'd used his last $20 to buy her gas.

    After that unexpected meeting, McClure and her boyfriend, Mark D'Amico, who both live in New Jersey, visited Bobbitt several times to deliver gift cards, cash, snacks and toiletries. They then decided to create a fund raising page so he wouldn't have to spend the holidays sleeping on the street.

    McClure started the GoFundMe page on November 10. With the page, the couple hoped to raise $10,000, enough money for his rent, a reliable vehicle and up to six months' expenses. Bobbitt's story ran in a local paper. By November 15,more than 10,000 local people had made donations through the GoFundMe page and more than $300,000 had been raised.

    On Thanksgiving, Bobbitt was resting in a hotel, his feet up on the bed, drawing up a grand plan for his new life, thanks to several thousand dollars raised to repay him for a good deed.

阅读理解

    On one occasion, while visiting my parents, I happened to meet the little boy who lived next door. It was obvious that his mother had told him not to come over uninvited. He was standing on the very edge of his yard with an anxious look on his face, seemingly about to burst.

    My father waved him over and performed the introductions. "Eliot, this is my son, Gary. Gary, meet my little friend, Eliot." To my delight, he reached out his small hand and I accepted the formality(遵守礼节) with a smile.

    Unlike most children, this teenager was not shy of meeting a stranger. As a matter of fact, he turned out to be quite a chatterbox. Eliot had me laughing as I listened to the excitement in his voice. for, as you know, it was a big deal to find a toad (蟾蜍)! His descriptions were priceless as I asked the obvious questions concerning the capture(捕捉). He was pleased that I showed interest in his adventure and gladly explained its details.

    Since Eliot seemed so willing to invest in our budding friendship, I asked him a question, "Do you like banjo music?" He got very excited and answered me with a hearty "Yes!"

    I took out my banjo from the car, but when I sat next to him and started playing, Eliot looked at me with a puzzled expression. He asked me "What's that?" in all seriousness.

    My dad and I smiled. The boy who just "loved" the banjo didn't recognize that I was holding one and that what I was playing was "banjo music".

    I realized that his heart was in the right place. Eliot just wanted to please his new friend with that "Yes", thinking it was what I wanted to hear.

    Well anyway...Eliot likes the banjo for real now. And I like Eliot.

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