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题型:阅读理解 题类:模拟题 难易度:普通

黑龙江省哈尔滨市哈三中2019届高三英语第三次模拟考试试卷

阅读理解

    Hacking isn't just for computers and smartphones, According to a study published last week in the journal Science, scientists have found a way to hack a plant's genes in order to make it use sunlight more quickly. Someday, the results could increase the amount of food produced around the world.

    Photosynthesis(光合作用)is the word used to describe how plants use sunlight, water, and carbon dioxide to make their own food. Scientists who conducted the new study say this is a very slow process. Plants use less than 1 percent of the energy available to therm. But by hacking a plant's genes, the scientists were able to increase the amount of leaf growth on plants between 14 and 20 percent.

    "Specifically, scientists hacked the plant's protective system. Normally, this system is activated when a plant gets too much sunlight, "said scientist Krishna Niyogi, co-author of the study. When the plant senses the light, it gets rid of extra energy and creates more leaves. When the plant is in shade, the protective system is turned off, but the process is slow.

    Stephen Long is the lead author of the study. He compared a plant's protective system to light-adjusting glasses. When a person wears the glasses outside during the day, the lenses(镜片)darken and lighten depending on how sunny it is. Plants do the same thing, he said. But in plants the adjustment can take anywhere from 10 minutes to an hour. This makes it hard for plants to get the right amount of sunlight needed to create food.

    The new study sped up the process. By changing the plant's genes, the protective system turned on and off more quickly than normal. As a result, leaf growth on the plants scientists used in the study increased. Leaf growth in two plants increased by 20 percent, while leaf growth on a third plant increased by 14 percent. Scientists conducted the study on tobacco plants. But they think the genetic changes will produce the same results in corn and rice.

(1)、What will happen to the plants when scientists change plants' genes?
A、They will become weaker and weaker. B、They will grow fast to produce more food. C、They will have more beautiful flowers. D、They will depend less on sunlight.
(2)、Why does the author mention light-adjusting glasses?
A、To warn people of the hot and bright sun. B、To explain the principle of plants' protective system. C、To help leaves of the plants absorb sunlight. D、To serve the science experiment smoothly.
(3)、In the future, the genetic changes will be used to.
A、improve tobacco plants' quality B、increase tobacco plants' leaves and roots C、improve the flowers' living time D、increase the production of corn and rice
(4)、Which of the following can be the theme of this text?
A、Hacking plants for more production B、Leaf growing more quickly C、Double production of tobacco plants D、Photosynthesis and production
举一反三
阅读理解

Product Description

    Life Without Limits helps you clarify what you want in every area of your life. By using Bassett's powerful techniques you will change; therefore your life will change. You control you life. will change. You control your life. And only you can take steps to change it. Life Without Limits helps you take back your power.

    Life Without Limits helps you to achieve satisfaction and fulfillment personally, professionally, and financially. Once you have defined what success means for you, you will clarify your dreams and start pursuing them.

Product Details

●Published in: 2001-12

●Released on: 2001-12-24

●Original language: English

●Dimensions: 5.3 x 0.7 x 8 inches

●Binding: Paperback

●304 pages

About the Author

    Lucinda Bassett is the founder and CEO of one of the most successful self-help companies in the country, the Midwest Center for Stress and Anxiety, Inc. Author of the national bestseller From Panic to Power, Lucinda Bassett produces and hosts the award-winning infomercial, Attacking Anxiety. She has shared her techniques with such clients as McDonalds, Chrysler, and AT&T. She has appeared on numerous talk shows, including Operah and The View, and been featured in Family Circle, Reader's Digest, and many more.

Customer Reviews

    This book has helped me to gain hope and courage to cope with all my fears and worries. Lucinda writes with such a great understanding and sympathy. She herself had problems with panic and worry. Her positive thinking tips are easy to follow. I don't get lost in a lot of mental problems. It's as if she were holding your hand, sitting right beside you, cheering you on! I believe I can do anything I set my mind to after reading this book. However, there are some other readers holding the contrary views.

阅读理解

    Amsterdam is a special city. There are many places you should not miss during your visit. Here is our list of the best.

Amsterdam canal ring

    The city old centre is formed from canal rings, which give you the feeling of space, freedom and peace. Walk through these canal streets or better — take a trip by renting a boat yourself. Another way to explore the Venice of the North is to take a ride on a bicycle. Any way you decide for - enjoy this city.

The National Maritime Museum

    The Maritime Museum is an attractive place to visit, especially with children. With many attractions in it, this colourful and enjoyable museum will help you understand the history of the Netherlands - a small nation which was one of the world's greatest sea powers.

Amsterdam Brown Cafe

    When you enter Amsterdam old cafes called Brown, at first it will seem too much from the past and too crowded, but the atmosphere is unique. Relax and watch - most of people around will be locals. Feel like one of them — the real Amsterdammers.

Civic Guards Gallery

    This gallery is filled with old paintings from the Dutch Golden Age. The exhibited canvas may be not always the masterpieces of art, but these group portraits of Amsterdam citizens and their wives are an exquisite (精致的) document of the Dutch civilization and culture centuries ago.

To avoid waiting lines we advise you to buy your tickets in advance online through our Amsterdam attractions and museums tickets webpage.

阅读理解

    In cooperation with German experts, several scientists from the University of Bradford believe that they finally solved a mystery that has been confusing millions of people: why our hair turns gray with age.

    The researchers came up with their results by examining native hair and cells from human hair follicles(毛囊). They say the secret turns out to be hidden in catalase(过氧化氢酶), which is causing hair to turn gray.

    Catalase production goes down with age and stress, allowing hydrogen peroxide(过氧化氢) in the hair to do its favorite job—making hair gray, and then white, by blocking the normal production of melanin(黑色素). Melanin is our hair's natural pigment that is responsible for the color of hair. It also determines the color of our eyes and skin.

    Dr. Gerald Weizmann, an editor of a journal, says," All of our hair cells make a tiny bit of hydrogen peroxide, but as we get older, this little bit becomes quite a lot, and our hair turns gray and then white."

    The new study brings hope for millions of people who have to color their hair: to finally obtain some shampoo that will decrease levels of hydrogen peroxide and therefore restore gray or white hair to its natural color or even prevent it from turning gray.

    The researchers are already conducting an experiment with such a drug on a few volunteers with gray hair and expect to get the results in the next two to three months. If everything works out, millions of people will choose between this drug and other previously used expensive dyes. However, even if the drug works, it will take at least several years before it can be brought to the market.

阅读下面短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项。

    It was a mid-winter's day. My Mom had ordered me and my two brothers outside so she could get a little housework done.

    My brothers were seven and five years older than me and much bigger as well. Still, it was I who decided to start the snowball fight. I hit one of them when they weren't looking and soon we were all making and throwing snowballs as fast as we could. Being little helped me avoid the first dozen or so snowballs that came my way until the one that caught me in the back of the head and sent me sliding into the two foot deep snowdrift. I felt two hands grasp my shoulders as my oldest brother lifted me out safely. I laughed as I dusted the snow off.

    Later Mom called us back inside for a lunch of hot, chicken soup. I drank it slowly and then sat near the old, wood stove in our living room and let the warmth quickly dry my damp socks and jeans. It felt so nice. I couldn't describe the feeling back then but I know now that it was pure happiness.

    In those innocent days of childhood there was no regret for the past or worry for the future. Each moment could be enjoyed just the way God intended. Each day could be filled with fun, laughter, and love. I think that we all need to re-experience that feeling in our lives. We need to live with childlike joy while keeping our adult wisdom. We need to throw a few snowballs and drink a few bowls of soup afterwards. We need to trust in our Heavenly Father's love for us and share our love with others as well. Life here is too brief not to enjoy all of its precious moments.

阅读理解

    A recent documentary produced by the British Broadcasting Corporation (BBC) has caused a stir in China and in the UK.

    The documentary, titled Are Our Kids Tough Enough? focuses on five Chinese teachers who are sent to teach 50 UK teens at a school in Hampshire.

    The teachers instruct the students for a month. The pupils are then tested, and the results are compared to the ones of those who have continued in the regular UK education system. The idea is to see if the Chinese method improves academic performance.

    The Chinese teachers use their own teaching methods but receive strong resistance from the students. A clip from the documentary online shows some problems, with Chinese teachers calling their students lazy and lacking in discipline, while the students say the high pressure and harsh teachers are driving them crazy.

    This has aroused a new debate in both China and the UK, with some arguing the teenagers need more regulation and discipline. Others say Chinese methods encourage rote learning (死记硬背) instead of independent thinking. For instance, Chinese language teachers should do more than pass on knowledge about words and characters. They should inspire students, helping them feel the sentiment from Chinese literature. This is a higher level of teaching.

    Yang Dongping, dean of the 21st Century Education Research Institute, says, "The Chinese teaching methods are designed to strictly train the majority. Foreign teaching methods, however, are more natural and relaxing, and designed to inspire students' interest in learning. Education methods are based on culture. That is why a successful education method in one place may not work that well when simply 'transplanted' into another place."

    Yang Dongping says, "The documentary does reflect some problems rooted in traditional Chinese teaching methods. Nobel prize winner, Yang Zhenning, gave a very fair comment on this issue. He said the Chinese-style education method works for most ordinary qualified students effectively, helping them reach high standards. However, it may weaken the training for high-potential outstanding students."

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