The Amazon Rainforest：A Natural Treasure Welcome to the Amazon rainforest.As the largest rainforest in the world，it plays a significant role in maintaining the fine balance of the Earth's ecosystem.
The Amazon rainforest crosses into eight countries.With an area of around 5.5 million square kilometres，the Amazon rainforest is more than half the size of China.The Amazon River，from which the rainforest gets its name，is about 6，440 kilometres in length.On its journey from the mountains to the ocean，the river supports many different ecosystems.（1）EE.
Of the 390，000 plant species known to man，more than 40，000 can be found in the Amazon rainforest.The forest's different levels support an unbelievable variety of wildlife.At the bottom，there is a system of roots beneath the ground.Above that is the mass of leaf litter on the dark forest floor.（2）DD.Then there are the towering ancient hardwoods，and finally the tops of the tallest trees many metres above the ground.Each level of the forest forms its own little world，home to different kinds of living things.
More than 1，300 species of birds and over 400 species of mammals hide among the jungle's plant life.The jaguar is one example.It has yellowish-brown coat with black spots.While a significant number of jaguars survive here，they are only one element of this forest's food chain. （3）AA.These frogs，in turn，feed on insects which eat leaves and fruit.When a jaguar dies，a tiny army of microorganisms helps break down its body and return the nutrients to the Earth.
The Amazon rainforest breathes life into the planet by fixing carbon and producing over 20 percent of all the Earth's oxygen.（4）BB.Moreover，the Amazon rainforest is a treasure house of species that can be used for food or medicine.Yet there is one major danger to these irreplaceable plants and animals：us.
（5）GG.As the impact of human activities such as agriculture and cattle farming continues to grow and the list of species in danger of extinction becomes longer，we are left with a question：can we afford to damage the "lungs of the planet"？
A.They feed on at least 87 species，including frogs
B.Thus，it is often known as the "lungs of the planet"
C.Rivers tend to be the easiest way to enter the forest
D.The next level is made up of shorter plants with large leaves
E.They give this area the richest species of plants and animals on the Earth
F.Currently the trees in the Amazon rainforest take in around 500 million tonnes of CO2 each year
G.Over the past 50 years，17 percent of the rainforest has disappeared due to human activities
【考点】自然科学研究成果．
【答案】E；D；A；B；G
【解答】
【点评】
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发布：2024/6/27 10:35:59组卷：5引用：2难度：0.4
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1．Like a tired marriage，the relationship between libraries and publishers has long been dull.E-books，however，are causing heartache.Libraries know they need digital services，but many publishers are too cautious about piracy and lost sales to co-operate.Among the big six publishers，only Random House and Harper Collins license e-books with most libraries.
Publishers are wise to be nervous.Owners of e-readers are exactly the customers they need：book-lovers with money.If these people switch to borrowing e-books instead of buying them，what then？Electronic borrowing is awfully convenient.Unlike printed books，which must be checked out and returned to a physical library miles away，book files can be downloaded at home.The files disappear from the device when they are due.
E-lending is not simple，however.There are various incompatible e-book formats，devices and licenses.Most libraries use a company called OverDrive，which secures rights from publishers and provides e-books and audio files in every format.Yet publishers and libraries are worried by OverDrive's global market dominance，as the company can control fees and conditions.Publishers were annoyed when OverDrive cooperated with Amazon，the world's biggest online bookseller，last year.Owners of Amazon's Kindle e-reader who want to borrow e-books from libraries are now redirected to Amazon's website.
According to Pew，an opinion researcher，library users are a perfect market for Amazon.Late last year Amazon introduced its Kindle Owners' Lending Library，which lets its best customers borrow free one of thousands of popular books each month.But a recent Pew survey found that more than half of Americans with library cards say they prefer to buy their e-books.It also noted that e-books actually are available at most libraries，and that popular titles often involve long waiting lists，which may inspire people to buy.
So publishers keep adjusting their lending arrangements in search of the right balance.Random House raised its licensing price earlier this year，and Harper Collins limits libraries to lending its titles 26 times.The story of the library e-book is a nail-biter.
（1）It can be inferred from Paragraph 1 that.
A．several big publishers have sold e-books to libraries
B．both libraries and publishers caution the e-book piracy
C．some publishers are hesitant to cooperate with libraries
D．libraries are eager to keep strong relationship with publishers
（2）What worries publishers about people's switch to e-books？
A．The risk of e-book piracy.
B．The possible decline of book sales.
C．No time limit for the downloaded book files.
D．The availability of the incompatible e-book formats.
（3）We can learn from Paragraph 3 and 4 that.
A．Amazon is adopting measures to win more customers
B．OverDrive distributes e-books and audio files to publishers
C．over half of Americans are borrowing e-books from libraries
D．the fees of lending e-books are under the control of publishers
（4）What is the best title for the text？
A．The Hopeful Future of Publishing Business
B．The Uncertain Economics of Lending E-books
C．The Dull Relationship between Libraries and Publishers
D．The Close Cooperation between OverDrive and Amazon发布：2025/1/1 16:0:1组卷：1引用：3难度：0.5 -
2．One day something that upset me happened，bringing（1）
（tear）to my eyes and making me angry.The incident took me out（2）balance and disturbed my inner peace.
To restore calm，I put on my outdoor equipment，picked up my skis（滑雪板）and（3）（go）to the park.I skied at（4）slow steady pace.I listened to the sound of the snow beneath my skis and the wind blowing through the bare branches of the trees.
I was honest with myself，（5）（recognize） that I was angry and could let it go.With each pass around the park，I felt my inner peace returning.I began to hear the birds singing.I noticed the wind had filled in my tracks with snow in some areas，creating a clean snowfield.I felt the（6）（strong）of my arms and legs as they worked together，aiming（7）（make） the skiing an enjoyable experience.I felt the healing power of being in nature.
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A.It's the same with social media.
B.Social media can be a double-edged sword.
C.People get more opinionated about the potential problems of social media.
D.They found that those who used social media more had higher depression scores.
E.They reviewed all existing research and found that there were both benefits and drawbacks.
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G.For example，just because higher social media use co-occurs with higher levels of depression doesn't mean social media use causes depression.发布：2025/1/1 15:0:2组卷：9引用：3难度：0.5
