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题型:阅读理解 题类:常考题 难易度:困难

高中英语-牛津译林版-高二上册-模块5 Unit 3 Science versus nature

阅读理解

    Exercise may help to safeguard the mind against depression through previously unknown effects on working muscles, according to a new study involving mice.

    Mental health experts have long been aware that even mild, repeated stress can contribute to the development of depression and other mood disorders in animals and people. Scientists have also known that exercise seems to cushion against depression. But precisely how exercise, a physical activity can lessen someone's risk for depression, a mood state, has been mysterious. So for the new study, researchers at the Karolinska Institute in Stockholm studied the brains and behavior of mice in a complicated and novel fashion.

    We can't ask mice if they are feeling cheerful or in low spirits. Instead, researchers have pictured certain behaviors that indicate depression in mice. If animals lose weight, stop seeking out a sugar solution when it's available — because, probably, they no longer experience normal pleasures — or give up trying to escape from the cold-water zone just freeze in place, they are categorized as depressed. And in the new experiment, after five weeks of frequent but low-level stress, such as being lightly shocked, mice displayed exactly those behaviors. They became depressed.

    The scientists could then have tested whether exercise blunts (延缓) the risk of developing depression after stress by having mice run first. But, frankly, from earlier research, they wanted to know how, so they bred pre-exercised mice. A wealth of earlier research by these scientists and others had shown that aerobic exercise, in both mice and people, increases the production within muscles of an enzyme (酶) called PGC-1alpha. The Karolinska scientists suspected that this enzyme somehow creates conditions within the body that protect the brain against depression. Then, the scientists exposed the animals, which without exercising, were in high levels of PGC-1alpha to five weeks of mild stress. The mice responded with slight symptoms of worry. But they did not develop depression. They continued to seek out sugar and fought to get out of the cold-water zone. Their high levels of PGC-1alpha appeared to make them depression-resistant. Finally, to ensure that these findings are relevant to people, the researchers had a group of adult volunteers complete three weeks of frequent endurance training, consisting of 40 to 50 minutes of moderate cycling or jogging. The scientists conducted muscle biopsies (活体检查) before and after the program and found that by the end of the three weeks, the volunteers' muscle cells contained substantially more PGC-1alpha than at the study's start. The finding of these results, in the simplest terms, is that “you reduce the risk of getting depression when you exercise,” said Maria Lindskog, a researcher at the Karolinska Institute.

(1)、The researchers at the Karolinska Institute in Stockholm conducted the new study hoping to know______.

A、if exercise cushions against depression B、what can lead to depression in animals and people C、if stress can contribute to the development of depression D、how exercise contributes to reducing someone's risk for depression
(2)、We can infer from the new experiment conducted by researchers at the Karolinska Institute that mice are depressed except when ______.

A、they stand still in place B、they stop searching for the sugar water C、they attempt to escape from the cold-water zone D、they can't experience normal pleasures any longer
(3)、Researchers asked a group of adult volunteers to complete three weeks of frequent endurance training in order to ______.

A、know if exercise can help to safeguard the mind against depression B、know if they can endure 40 to 50 minutes of moderate cycling or jogging C、confirm the findings above are also relevant to people D、ensure they can lose weight after moderate cycling or jogging
(4)、It can be concluded from the passage that______.

A、the enzyme called PGC-1alpha helps to ease depression B、athletes are more likely to develop depression than ordinary people C、the mice with high levels of PGC-1alpha are easier to develop depression D、in the past mental health specialists didn't know exercise could help reduce depression
举一反三
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    Have you ever heard of the Coral Sea? It is home to an amazing variety of turtles, sharks, whales, dolphins, large fish, birds, corals, plants, and many other species. Many of these species are endangered elsewhere in the world, but still survive in the healthy environment of the Coral Sea.

    The Coral Sea is a large series of coral reefs located off the northeast coast of Australia. This area is three times larger than Australia's famous Great Barrier Reef, which the Coral Sea borders.

    The Coral Sea is one of the few coral reef environments that have remained largely undamaged by over-fishing, oil and gas exploration and pollution. However, statistics show that coral reefs around the world are disappearing five times faster than rainforests. It is very likely that in the near future the Coral Sea will face the same threats to its existence.

    The Australian government is currently looking at options for protecting the Coral Sea but has made no decisions. Environmentalists are pushing for laws to declare the Coral Sea area a marine protected area, which will mean a large “no-take zone” for fishermen, a no-exploration zone for gas and oil companies and a no-dump zone for pollution, possibly making the Coral Sea a marine park larger than any other in the world.

    We can write letters to Australian leaders, Australian environmental protection agencies, and Australian friends, to let them know that people worldwide support this protection of the Coral Sea. To lose this last great marine wilderness world would be a loss for the whole world.

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    Nine years ago, a few days before Christmas, I was a director at a company in San Francisco, and I was called into a meeting that was already in progress. That meeting turned out to be my exit interview. I was 64 years old at the time. It wasn't completely unexpected. I signed a pile of papers and left the company.

    So, 40 plus years of employment was over. I had a good reputation and background. Retirement was not a choice for me. I wanted to do something. And then an idea came into my mind, born from my concern for our environment. I wanted to build my own business, designing and producing biodegradable(可生物降解的)packaging from waste. This is called clean technology, and it was really meaningful to me. It could help reduce billions of pounds of single-use plastic packaging wasted each year.

    Five years later, I'm delighted and proud to share with you that our income has doubled every year and we have no debt. Meanwhile, I have a wonderful partner, and we've won more than 20 awards for the work that we've done.

    And I am doing the most rewarding and meaningful work of my life right now. But what I really long for is to find other first-time entrepreneurs(企业家)who are my age. I want to connect with them.

    So I want to do something about that in a few years. I want us to start talking more about people who don't become entrepreneurs until they are seniors. And then connecting all of them across industries, regions and countries—building a community.

阅读短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项。

Fantastic Fall Festivals You Won't Want to Miss

    Seymour Apple Festival

    Admission to the Seymour Apple Festival is free and so is the entertainment! More than 15, 000 people from all over the region come out to take part in the activities, ranging from drawings, vendor booths, food, apple contests, bike-decorating contests, and more.

    Marionville Apple Festival

    The popular Marionville Apple Festival is home to countless activities and events. The carnival, pony rides, and games will keep the kids busy, while adults will enjoy watching the pie-eating contest and browsing dozens of craft vendor booths.

    Humansville Fall Festival

    The Humansville Fall Festival may be hosted by a small town but that doesn't mean it's lacking big fun. Perfect for all ages, this fall festival is celebrating its 70th year and will provide three full days of fun. This year's festival will feature live music from fantastic local musicians, which will definitely make it different from the ones in other years. You'll also find fun carnival rides, talented artisans selling their goods, and an amazing parade to wrap up the event on Saturday.

    Southside Fall Festival

    The Southside Fall Festival is perfect for family celebrations, with an alcohol-free environment and free admission. Enjoy a colorful parade and float contest, delicious food vendors, live music, karaoke, and more.

    Fall Into Arts Festival

    Make sure to bring the kids along for this festival that celebrates all things creative. The Fall Into Arts Festival features a host of kid-friendly activities like a lego build, sand art, bubble stations, chalk the sidewalk, a jump house, and more. Parents will have plenty to do as well, with an excellent variety of artists, festival food, a mini film festival, and much more.

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A Wild Child's Guide to Endangered Animals

From New York Times bestselling author Millie Marotta comes this gorgeous celebration of the animal kingdom. Highlighting 43 endangered species, the book takes readers on a trip around the world while learning about rare and well-known animals and their habitats.

Marcovaldo

Marcovaldo is a collection of 20 short stories written by Italo Calvino. Describing the life of a poor rural man living in northern Italy, the stories unfold according to the seasonal cycle of a year. Common themes in the stories include pollution, failure and poverty.

The Art of Mondo

Over the years, Mondo has received global recognition for its incredible art posters that bring to life classic films, television shows, and comics such as Jurassic Park. For the first time, The Art of Mondo brings together this highly sought-after art in one volume that showcases the incredible creativity of the studio's artists whose vastly different styles are united by one guiding principle: limitless passion for their subject matters.

The Coming of the Third Reich

There is no story in 20th-century history more important to understand than Hitler's rise to power and the collapse(坍塌) of civilization in Nazi Germany. The Coming of the Third Reich, by Richard Evans, offers a masterful combination of academic work, important new research and interpretations.

Patriarchy and Capitalism

Chizuko Ueno, a leading Japanese sociologist, feminist critic and public intellectual, has been a pioneer in women's studies and the author of many books, including Patriarchy and Capitalism.

 阅读七选五

After building some "standard"cargo bikes, {#blank#}1{#/blank#} ,this time with something very special. I wanted to build an ideal cargo bike combining the stability of a three-wheeler with the possibility to change directions like being on two wheels. 
The first step was to do extensive research {#blank#}2{#/blank#} .An incredible source of technical inspiration was the online Tilting Group.Although primarily-concerned with tilting(倾斜) concepts of engine driven constructions,the group is surely the best place to find information about constructing a tilter. 
    After researching and outlining a few ideas,I grabbed some parts and started with a very simple prototype(雏形).Building such a vehicle needs a high degree of accuracy,which was not the case with my prototype {#blank#}3{#/blank#} .So I made a few more sketches(草图),which led to an improved version of the driving and tilting mechanism. 
    Then I started building the tricycle.Building the structure was quite straightforward.As usual I took an old bike apart for the back triangle and then added the front part.After adding a cargo basket to the structure, {#blank#}4{#/blank#} . 
    Now came the hard part:the driving mechanism.I started with the usual design used for two-wheel cargo bikes,but it took me quite some time to figure out how to pass the driving force to both wheels without allowing the whole thing to lock itself in any angle {#blank#}5{#/blank#} , but I'm sure I can use the knowledge I gained one way or another. 


A.The project was demanding 
B.I decided to get my hands dirty again 
C.I fell in love with three-wheeler bikes 
D.I put all the parts together for the first time 
E.It took me quite some time to understand the ideas behind it 
F.The engine driven constructions were always the most difficult to fix 
D.The consequence was that the driving mechanism locked itself occasionally

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