Humans aren't the only ones getting a buzz from coffee．Caffeine can improve memory among honeybees and lead to better pollination（授粉）．According to a recent study published in the journal Science．
The study was conducted by a team of researchers at Newcastle University in the United Kingdom．They found that the nectar（花蜜）of some flowers，such as those from grapefruit and lemon plants，as well as certain coffee flowers，contains low doses of caffeine．To get bees to feed on these flowers，the team trained the insects to associate food with the smell of the flowers．They also trained another group of bees to feed on nectar from flowers that were sweetened with a sugar，but did not contain caffeine．After 24 hours，the bees trained on caffeinated flowers returned to these plants three times as often as those trained on the sweetened flowers returned to the uncaffeinated plants．
Professor Geraldine Wright led the researchers．"Remembering floral traits（花部特征）is difficult for bees to perform at a fast pace as they fly from flower to flower and we found that caffeine helps the bee remember where the flowers are，"Wright said in a statement．
Improved memory led to the better pollination．That's because once bees sip the caffeine nectar，they continue to look for more coffee plants to pollinate．This also suggests that caffeine plays a role in improving the bees' ability to search for food．
Researchers found that caffeine's effect on the bee brain is similar to its effect on mammals．"The change is similar to that produced by caffeine in neurons（神經(jīng)元）associated with learning and memory in the rat brain，"Wright said．
Bee populations have declining since 2007．The dramatic drop in the insects' numbers has serious effects for ecosystems and the farming industry．Bees are needed in the reproduction of crops and spreading wild flower species．Understanding what keeps bees buzzing could help to make sure that the insects are able to remember and pollinate their favorite flowers．
（1）Which of the following is mentioned in the passage？ CC
A．Caffeine has no effect on the rat brain．
B．Bee population has been increasing．
C．The nectar of lemon plants contains caffeine．
D．Bees dislike nectar from sweetened flowers．
（2）After reading the passage，John，who works in the farming industry，will probably feel DD．
A．a(chǎn)nnoyed
B．a(chǎn)ngry
C．nervous
D．excited
（3）Which of the following relationship is correct according to the passage？ BB
A．improved memory-caffeine nectar-better pollination
B．caffeine nectar-improved memory-better pollination
C．improved memory-better pollination-caffeine nectar
D．caffeine nectar-better pollination-improved memory
（4）What section of a newspaper may this passage be taken from？ AA
A．Science
B．Education
C．Culture
D．Sports
【考點(diǎn)】日常生活．
【答案】C；D；B；A
【解答】
【點(diǎn)評(píng)】
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發(fā)布：2024/5/27 14:0:0組卷：1引用：1難度：0.7
相似題
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1．All routes to STEM （science，technology，engineering and mathematics） degrees run through calculus （微積分） classes.Each year，thousands of college students take introductory calculus.But only a small number ultimately complete a STEM degree，and research about why students abandon such degrees suggests that traditional calculus courses are one of the reasons.With scientific understanding and innovation increasingly central to solving 21st-century problems，this loss of talent is something society can ill afford.
Math departments alone are unlikely to solve this dilemma.Several of the promising calculus reforms were spearheaded by professors outside of math departments.STEM faculty are prioritizing cooperation across disciplines to transform math classes to cultivate a diverse generation of STEM researchers and professionals.
This is not uncharted territory.In 2013，life sciences faculty at the University of California，Los Angeles，developed a two-course sequence that covers classic calculus topics，but also emphasizes their application in a biological context.Creating this course，Mathematics for Life Scientists，wasn't easy.The life sciences faculty involved，none of whom had a joint appointment with the math department，said they turned to designing the course themselves after math faculty rejected their request for cooperation.
In Ohio，Wright State University's Engineering departments also revised math offerings.Rather than changing the content of the calculus course，they focused on preparing students for calculus by emphasizing "engineering motivation for math." The approach enhanced opportunities for students with weaker math backgrounds to succeed in engineering and doubled the average graduation rate of engineering students without reducing the average grade of graduates.Math learning is fundamental to all STEM fields，but the opposite also appears to be true.
（1）What problem is mentioned in paragraph 1？
A．Increasing STEM dropout rate.
B．The reform of calculus courses.
C．Shrinking admission to STEM majors.
D．The shaken belief in the role of calculus.
（2）What does "spearheaded" in paragraph 2 probably mean？
A．challenged
B．evaluated
C．cancelled
D．initiated
（3）What do we know about the calculus course reform according to the text？
A．STEM departments made calculus content easier to improve students' grades.
B．Math departments sought cooperation with STEM counterparts to urge reforms.
C．Placing calculus learning in specific STEM contexts is a workable approach.
D．Removing calculus is the key to increasing graduation rate of STEM students.
（4）What does "the opposite" in the last paragraph refer to？
A．The STEM fields may be the foundation of other science subjects.
B．The STEM fields may be central to making math learning effective.
C．Math learning may set barrier for science study in the STEM fields.
D．Math learning may make way for science study in the STEM fields.發(fā)布：2025/1/1 17:30:2組卷：24引用：3難度：0.5 -
2．I once thought that outer beauty is the only factor to become a great person.When I was young，I read many kinds of books，most of which described characters who are handsome or beautiful.So I think that being beautiful is the only way to become a success.
As I grew up，the story of my best friend made me realize that outer beauty was not so important to make a person successful.She is so beautiful a girl that every classmate liked to chat with her，but she was very arrogant（傲慢）.In her opinion，she could get all she wanted because of her beauty，but all of her friends left her one by one!Only then did she come to know the importance of the beauty in a person's heart，which changed her attitude and she made friends again.
Turning on TV，we can see many advertisements，most of which seem to give us a feeling that，physical attractiveness is the most important thing. There seems to be a boom in plastic surgery.It is surprising that more and more people，especially girls and women，try it like the first man-made beauty in China，Hao Lulu.It is a common sense that attractive people can easily find work.Most good-looking guys，usually get higher scores in the job interviews.But what is real beauty？I want to say that is inner beauty because those who have beauty in their soul are really beautiful persons.
As is known，the beauty judged with eyes is temporary，so we should concentrate on inner beauty.And if we make the efforts to make our minds beautiful，we'll live a happier life.
（1）Why did the author want to have a good appearance when she was young？
A．Because she wanted to follow the example of her friend.
B．Because she wanted to be one of the characters in the book.
C．Because she wanted to get higher scores in the job interviews.
D．Because the successful characters in the books she read were attractive.
（2）Why did the writer refer to her friend's story？
A．To show how beautiful her friend was.
B．To show how important outer beauty is.
C．To show the importance of inner beauty.
D．To show how terrible to be a beautiful girl.
（3）What does the underlined sentence in the third paragraph mean？
A．Surgery is becoming more and more popular.
B．More and more people pay attention to outer beauty.
C．More people can afford the price of doing plastic surgery.
D．The living standard has been improved over the past years.
（4）Which of the following covers the passage best？
A．Inner beauty is the real beauty.
B．How do attractive persons become successful？
C．The key factor to find a good job is being attractive.
D．Plastic surgery is the best way to make a person more beautiful.
（5）What do we know from the passage？
A．If you are too beautiful，all your friends will leave you out of envy.
B．If you have a good appearance，you must get higher scores in the job interviews.
C．Without the TV advertisements，there wouldn't have been a boom in plastic surgery.
D．Those who have good appearances should also develop the beauty in their hearts.發(fā)布：2025/1/1 18:0:1組卷：12引用：2難度：0.6 -
3．Dear Laura，
I just heard you tell an old story of gift giving and unselfish love in your program．You doubted that such unselfish love would happen in today's world．Well，I'm here to give you （1）．
I wanted to do something very （2）for my fifteen - year - old son，who has always been the perfect child．He （3）all summer to earn enough money to buy a used motorcycle．Then，he spent hours and hours on it （4）it looked almost new．I was so （5）of him that I bought him the shiniest helmet and a riding outfit．
I could （6）wait for him to open up his gift．In fact，I barely slept the night before．Upon awakening．I went to the kitchen to （7）the coffee，tea，and morning goodies．In the living room was a beautiful keyboard with a （8）： "To my wonderful mother，all my love，your son．"
I was so （9）．It had been a long - standing joke in our family that I wanted a piano so that I could （10）lessons． "L earn to play the piano，and I'll get you one" was my husband's （11）．
I stood there shocked，crying a river，asking myself how my son could （12）this expensive gift．
Of course，the （13）awoke，and my son was thrilled（激動(dòng)的）with my reaction．Many kisses were （14），and I immediately wanted him to （15）my gift．
As he saw the helmet and outfit，the look on his face was not （16）what I was expecting．Then I （17）that he had sold the motorcycle to get me the keyboard．
Of course I was the proudest mother （18）on that day，and my feet never hit the ground for a month．
So I wanted you to know，that kind of love still （19）and lives even in the ever-changing world of me，me，me!
I thought you'd love to （20）this story．
keyboard
Yours，
Hilary
P．S．The next day，my husband and I bought him a new "used" already shiny motorcycle．（1） A．support B．a(chǎn)dvice C．hope D．courage （2） A．polite B．similar C．special D．private （3） A．played B．studied C．traveled D．worked （4） A．a(chǎn)fter B．before C．until D．unless （5） A．sure B．fond C．proud D．confident （6） A．perhaps B．really C．a(chǎn)lmost D．hardly （7） A．cook B．start C．set D．serve （8） A．note B．notice C．word D．sign （9） A．disturbed B．confused C．inspired D．a(chǎn)stonished （10） A．give B．take C．draw D．teach （11） A．reason B．request C．comment D．response （12） A．present B．a(chǎn)fford C．find D．order （13） A．neighbor B．building C．house D．home （14） A．exchanged B．experienced C．expected D．exhibited （15） A．tear B．open C．check D．receive （16） A．purely B．exactly C．obviously D．basically （17） A．realized B．remembered C．imagined D．supposed （18） A．only B．still C．ever D．even （19） A．works B．exists C．matters D．counts （20） A．send B．publish C．write D．share 發(fā)布：2025/1/30 8:0:1組卷：6引用：1難度：0.2