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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
    When people introduce themselves,  I always hear them say "I'm just ahousewife".  I don't understand whytheir introduction is always filled with regret and self - pity.  Is it, really a crime to be a housewife? Isit really embarrassing when you choose not to work outside and instead chooseto work in  your home?

    How could you be "just ahousewife" when the basic social unit of society depends on you and yourservice? A housewife works for the longest hour, supporting your husband, childstudies, caring for eld-ers, managing finances, paying bills, grocery shopping,cooking according to individual taste, cleaning, etc. A housewife could beanyone: daughter, wife, mother, teacher, financial advisor, fashion designerand nurse, gardener, driver, cook, and so on. Don't think you are not being paid for it.  You get the re-ward that no money canoffer-the love and affection of your family, their trust in you, ahappy home and your own satisfaction.

    It is you who choose to be in thisoccupation, willingly or for any other reason. After a busy day, all wait to return to the comfortable home set by you.They know you will be there to absorb all their stress and tiredness and relaxthem. Would the life have been the same had you been working outside to earnsome money? Would you along with your family have been able to buy all thecontent in life that you are enjoying now with that money?

    Respect yourself for what you are. Introduce yourself to the world with the same dignity. The world understandsthe importance of your job; it's time to make them accept it. Introduceyourself with pride and with twinkle in your eyes "I am a housewife".Kick that "just" out.

阅读理解

AVOID PUBLIC WI-FI

    Free Wi-fi offered in public places is often poorly secured. Hackers need only ordinary tools to access mobile phones linked to the network and the information the devices store.

DON'T OVERSHARE ONLINE

    Internet users can let their guard down when chatting with strangers on social media, letting slip their names, family details, workplace addresses and job titles to their new “friends”. Some parents even share photos of their children online, forgetting to hide details that can disclose their names, schools or where they live.

AVOID ONLINE SURVEYS

    Some questionnaires try to attract people with small rewards or a chance to take part in a “lucky draw”. But to qualify, people must fill in their names, phone numbers and home addresses. Check the website where the survey is being hosted and consider whether it's reliable.

KEEP ONLINE RESUMES BRIEF

    Internet users often do not hesitate to provide detailed personal information in their online resumes, thinking it can only help probable employers to contact them. Some job site operators even require applicants to list their family members' information. China's Ministry of Public Security says people should give only the information necessary.

TRACK COPIES OF YOUR ID CARD

    Banks, telecommunications operators and other service providers often require photocopies of your identity cards to open accounts or perform other business. Dishonest employees might then try to sell them to scammers (骗子).

阅读理解

    Having friends may well keep you healthier and help you deal with stress better. Some studies show that people with close friends have a greater ability to fight disease than people who are alone.

    Place friendship in the first place. Find the time to be with friends even if it means letting the lawn(草坪) go unmowed (未割的) or the dishes unwashed for a while. When you can't get together, use the phone to keep in touch.

    Open up to close friends. Keeping a deep friendship requires a level of “heartfelt” intimacy (亲密).Don't be afraid to express your inner fears and disappointments. Listen to your friends when they have problems, but offer advice only when it's wanted. Help raise friends' self-esteem(自尊) when they are sad about a job loss, or other such events.

    Have different friends for different activities, such as going to the movies, singing in a choir, and joining in a bowling league.

    Don't wait for a friend to ask for helps. When a friend has the flu, offer to go to the store or drive his or her children to their afterschool activities.

    Never take a friendship for granted. Like a good marriage, friendship needs care and patience. Become a joiner. Find a group that matches your interests.

    Talk to strangers. Conversations started in museums, laundry rooms, or bookstores can lead to firm friendship.

    Enroll in an adult education course. A classroom is an ideal place to meet others with similar interests.

阅读理解

    This story happened when I was in Saint Lucia with my family. My sister, Diana, who also happens to be my best friend and one of the funniest and kindest people I know, went blind in one eye about 9 years ago. Diana sometimes feels concerned about the way her eye looks now. The pupil(瞳孔) is no longer black; it's sort of "glows" in photos. Diana recently purchased a special contact lens (隐形镜片) that makes her eye look like it did before it changed color, but she doesn't wear this lens often because it becomes quite painful after about an hour.

    One night during our holiday, a hotel photographer was taking pictures of the guests as they entered the area set up for dinner. Diana casually said if she had known there was going to be pictures taken to capture this special memory, she would have worn her contact lens so her eye wouldn't be so shiny in the picture.

    The next day, I was sitting with Diana and her husband Ted. While we were talking, the photographer who had been at the dinner the night before, handed her a photo, leaned in and quietly said, "I matched the color of your eyes in the picture."

    As he walked away, my sister happily said to me and Ted, "Look! He fixed my eye!" The photographer stopped. He turned around and walked back to our table. He put his hand on Diana's shoulder, leaned in again and gently said, "Just to be clear: I didn't fix your eye. There isn't anything wrong with your eye. I simply matched the color. "

    Her eyes filled up with tears. It was very healing for her heart to hear these beautiful words. It didn't take much time and made so much difference. It helped her change the way she feels about herself.

    I have always loved the quote: "The world is full of good people. If you can't find one, be one!" Your acts of kindness can impact the world in profound ways!

阅读理解

    Here's the bad news: Men are hurting, and, according to many researchers. masculinity (男子气) is what is hurting them and making it hard for them to maintain friendships. Society tells men to hide their feelings and expects them to be aggressive, so many men lose their friendship when growing up. The good news is that those skills can be recovered!

    There are a lot of experts who can help. and here's what they recommend:

    ⒈Accept your own desire and normalize it for the people in your life. Way, an expert, recommends sharing articles about masculinity and friendship so that you can start these conversations! Concentrate on them and don't forget you have the entire Internet at your fingertips, friend!

    ⒉Model vulnerability. Say the thing that frightens or worries you. like "I'm afraid nobody will go to my party," or "I miss my grandma every day." Doing so will make it easier for other people to follow your lead. We are all on the elevator to a society where emotional availability is normalized, and I want you to press "door open".

    ⒊Ask more questions. People sometimes feel they might be prying (爱打听的) if they ask someone about themselves-especially when their friend is sharing something tough. But if you get curious in moments of vulnerability you will open the door to all kinds of growth in your relationship. Take the opportunity to really see your friend and show them they matter by following up.

    ⒋Get close with the children in your life. Way's research says that the top priority that helps children (especially boys) grow up to have enriching friendships is to be close with an adult relative who was not afraid to express emotions. So. if you are a father. stepfather. or thinking about becoming one. or if you have nieces or nephews, take the opportunity to be close to them and help them grow up to be good friends, too.

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