You may have heard adults say they are uncomfortable in the morning without a cup of coffee.One reason they may feel that way is that coffee contains caffeine（咖啡因），Caffeine appears naturally in coffee，tea，and cocoa beans，which are used to make chocolate.But now food makers are adding it to many products，from potato chips to water.
The US government is especially worried about the problem.That's why the Food and Drug Administration（FDA）is studying the health effects of caffeine on young people.Studies show that too much caffeine can make people nervous and unable to sleep.What's more，caffeine is habit-forming.Those who consume it regularly and stop suddenly may experience headaches and feel tired.
One of the biggest concerns is the large amount of caffeine added to so-called energy drinks，like Red Bull.A 12-ounce can of cola has about 35 milligrams of caffeine.A similar serving of Red Bull contains more than three times that amount.
The Institute of Medicine is also working on caffeine-safety measures."Teenagers should not drink beverages that contain caffeine.They should be aware of caffeine's effects on health and on how the brain works.Take，for example，teenagers who consume caffeine to stay awake and study for a test.They will remember less of what they just studied，"said Stallings，a member of the institute.
Companies that make products with added caffeine claim they do not advertise them to kids.However，there is no law to stop children from buying them.So the FDA needs to set limits on caffeine，especially in energy drinks.As for added caffeine in foods，the government should just say no.If not，the amount of caffeine should be printed on food labels to remind consumers.The government must do that.
Doctors say kids should avoid caffeine.If you need extra energy，try these natural boosters：eat right，exercise.jye.ai get plenty of sleep.
（1）What is the US government particularly concerned about？ BB
A．The fact that coffee contains caffeine.
B．The practice of adding caffeine to foods.
C．The measures of avoiding caffeine's effects.
D．The practice of using caffeine to make chocolate.
（2）Red Bull is listed in the third paragraph as an example of CC.
A．caffeine's effects on health
B．teenagers'addiction to caffeine
C．drinks which contain much caffeine
D．people's concern about teenagers'health
（3）Paragraph 5 is mainly about AA.
A．the measures of protecting teenagers from caffeine's effects
B．the process of the government's controlling the use of caffeine
C．the government's responsibility of taking care of teenagers
D．the risk of buying products containing caffeine nowadays
（4）The author may agree that DD.
A．headaches and feeling tired are common in teenagers
B．food makers don't add much caffeine to many products now
C．caffeine is good and useful for teenagers' study
D．getting enough sleep can make people energetic
【考點】說明文．
【答案】B；C；A；D
【解答】
【點評】
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發(fā)布：2024/10/17 0:0:1組卷：8引用：2難度：0.4
相似題
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1．In 2019，the world generated 54.6 million tons of e-waste.However，just 17.4 percent of it was formally collected and recycled.Since 2014，the amount of e-waste recycled has grown by 1.8 million tons -a relatively small amount，considering that the amount of e-waste generated increased by 9.2 million tons in the same period.
Global reserves of some elements，such as platinum，are supposed to be fully used up within 15 years if the proportion of recycled stocks entering production doesn't increase.E-waste and EV batteries are currently recycled through processes called pyrometallurgy（火法冶金術）and hydrometallurgy（濕法冶金術）.However，they involve burning temperatures with a high energy demand and deep carbon footprint，and poisonous chemicals which are harmful to the environment.Alternatives are therefore being sought.
A team of scientists from the University of Coventry are extending one such alternative.They have been using non-poisonous bacteria to oxidize and recover the precious metals-a process known as "bioleaching".They have shown that copper is widely recoverable from e-waste，and that all metals present in EV batteries can be recovered by using microbes（微生物）.If extended，bioleaching facilities would mean that manufacturers of EV batteries and other electronic goods would be able to recover metals locally，relying less on costly exports to recycling centers abroad.
"At present，a key limitation for e-waste recycling is the lack of certification detailing the types and amounts of metals contained in electronic goods.But with an efficient recycling process appearing，manufacturers have the motivation to use more recycled material in their products，which will change the very design of electronics goods.It's about closing the loop of a product's life cycle，" said the leader of the Bioleaching Research Group，Sebastien Farnaud.
Ultimately，bioleaching technology is born out of the idea of creating a truly circular process for the things that we consume.We need to shift from a mindset and economy where we see waste as an end product，to one where there isn't even a start or an end at all.
（1）What do the statistics in Paragraph 1 indicate？
A．People pay no attention to e-waste recycling.
B．The recycling rate of e-waste is comparatively low.
C．E-waste has caused serious environmental problems.
D．The amount of e-waste is sharply increasing every year.
（2）What is the disadvantage of current ways of recycling e-waste？
A．They are not environmentally friendly.
B．They only apply to certain e-waste.
C．They generate metals with a complex process.
D．They cause a sharp rise in local temperatures.
（3）What do we know about the bioleaching technology？
A．It has been applied abroad.
B．It releases no poisonous gas.
C．It recovers metals by microbes.
D．It promotes the local export trade.
（4）The text is most probably a part of.
A．a(chǎn) travel guide
B．a(chǎn) fiction novel
C．a(chǎn) health magazine
D．a(chǎn) scientific journal發(fā)布：2025/1/1 17:30:2組卷：1引用：2難度：0.6 -
2．When we see a person in trouble，the first idea that comes to our mind is to lend a hand.But what if we see an animal in trouble，does the same rule apply？
This question was raised after a group of penguins were saved from an icy gully（峽谷） in Antarctica.It was filmed for the BBC wildlife series Dynasties.The film crew were anxious when they saw that a group of penguins had fallen into a gully and been trapped with their young.They built a slope（斜坡） so that a few of the penguins could save themselves.
The case has taken the international media by storm.Viewers watching this film sighed in relief. "I'm so glad.I understand not taking action directly，but a helping hand isn't bothering，right？" viewer Kathryn Shaw said on her Facebook.
However，others think human interference（干涉）is unnatural. "You can't have sunshine throughout your life.To have done anything else would only make matters worse." said the show's creator David Attenborough，according to The Times.
In this case，however，Mike Gunton，the executive producer of the series，said that this was a one-off situation. "There were no animals going to suffer by interfering.You weren't touching the animals and it was just felt by doing this…They had the chance not to have to keep slipping down the slope." he told the BBC.
Such cases are familiar to Paul Nicklen，wildlife photographer for National Geographic.He told Metro，"If it's ever a predator（捕食者） situation，no matter how gut wrenching，you stay out of the way.Even when you're watching a male polar bear eat a baby bear."
"There's no rule book in those situations.You can only respond to the facts that are right there in front of you." Will Lawson，the show's director，told Daily Mail.
（1）What has led to a heated media discussion？
A．The rescue of penguins from a gully.
B．People's various remarks on penguins.
C．Some penguins' sufferings in a gully.
D．Ways of filming the series Dynasties.
（2）Who holds a positive attitude towards human interference？
A．David Attenborough.
B．Will Lawson.
C．Paul Nicklen.
D．Kathryn Shaw.
（3）Which of the following best explains the word "gutwrenching" underlined in Paragraph 6？
A．Making one confused.
B．Making one heartbroken.
C．Putting one in danger.
D．Putting one in place.
（4）What can be the best title for the text？
A．Necessity of Lending a Hand to Animals
B．Protect Animals From Dying Out
C．Human Interference on Dangerous Animals
D．Help Animals in Trouble or Not發(fā)布：2025/1/1 17:30:2組卷：2引用：3難度：0.5 -
3．The history of Azerbaijani cinema dates back to the end of the 19th century，during which，many excellent movies have been filmed，which are still watched and admired by everyone.
These movies were filmed in many beautiful places：from the comfortable and winding streets of the Icharishahar（Old City）—UNESCO World Heritage Site in Baku—to the beautiful fruit gardens and forests of beautiful areas of Azerbaijan.
Here，on these streets，one of the most famous Azerbaijani films，Arshin Mal Alan，directed by Rza Tahmasib，was filmed.
Filmed in 1945 and characterized by its amazing plot，beautiful music，great singing and acting，Arshin Mal Alan quickly became a box office sensation （轟動）.
It remains an important cultural touchstone across Eurasia and has been translated into 86 languages and shown in 136 countries.
The film is about pure love，women's rights，and a young couple's dreams for a modern way of life.
The plot tells us about a rich young man named Asker.One day，he decides to get married.However，according to the Eastern rule，a bride （新娘） needs to cover her face before the wedding.But soon he finds a solution to this problem.On the advice of his friend Suleyman，Asker dresses up as a street seller of cloth.By selling goods，these sellers can enter houses where the women and girls choosing their cloth don't cover their faces.Now Asker can go into any yard and choose a bride.
The film has a lot of entertaining moments，songs and humour.The black-and-white version of this film has also been restored and can now be viewed in colour.
However，this is not the only movie that was filmed in the Old City.For example，in the films Amphibian Man and The Diamond Arm，you can see the streets well known to every Azerbaijaní.
（1）What can we know about Arshin Mal Alan？
A．It was filmed before 1945.
B．It is popular around the world.
C．It is an action film with amazing plot.
D．It can be viewed in black and white only.
（2）What is the Eastern rule about marriage in Arshin Mal Alan？
A．A man must be rich in order to marry his bride.
B．A man must dress up as a seller at the wedding.
C．A man mustn't see his bride's face before the wedding.
D．A man must buy a house for his bride before the wedding.
（3）Why does Asker dress up as a seller of cloth？
A．To choose a bride.
B．To make a film.
C．To work in the street.
D．To earn more money.
（4）What is the text mainly about？
A．The street culture in Azerbaijan.
B．The history of black-and-white TV.
C．A love story between Asker and his bride.
D．A famous movie filmed in Old City—Icharishahar.發(fā)布：2025/1/1 17:30:2組卷：0引用：4難度：0.3
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