17-year-old Dasia Taylor was named one of 40 finalists in the Regeneron Science Talent Search （STS），the nation's most famous Science and math competition for high school seniors.
Dasia's sutures （縫合線） work by changing color if the patients' pH level changes，indicating an infection.pH is one of the most common parts of wound healing，Dasia said.It changes very quickly，so it's one of the fastest ways to recognize infection.
So，she started experimenting with root vegetables. "I found that beet changed color at the perfect pH point，" says Taylor. "That's perfect for an infected wound.And so，I was like，'Oh，okay.So beet is where it's at'." Beet provided the perfect dye for her invention，changing from bright red to dark purple when a surgical wound becomes infected.After more than a year of research，Taylor is working on getting her sutures patented.
She imagines these sutures being used in developing countries where they can save lives and money. "The goal of my project is to reduce the number of deadly surgical site infections in developing countries because developing countries suffer from the most number of deaths due to surgical site infections，" she said. "I was like there is no way that that should be happening.The equity part of my brain and all the work that I do around equity was like 'That shouldn't be happening.They should have the resources to save their citizens in their country.' So，my goal is to work on that and make sure that it can actually discover those types of infections and stuff." After graduation，Dasia hopes to attend Howard University，study political science and finally become a lawyer.
（1）How can a patient quickly know if a wound is infected？ CC
A．By observing the pH test paper.
B．Through the doctors' examination.
C．By looking at sutures' color changing.
D．By observing how the wound changes.
（2）What did Dasia discover in her experiment？ DD
A．Beet has the same pH level.
B．Beet can change color at different times.
C．Beet therapy is good for wound healing.
D．Beet can be used to help her with the invention.
（3）What can we learn about Dasia？ CC
A．She has won the invention patent.
B．She became the winner of the Regeneron STS.
C．She made contributions to surgical infection recognition.
D．She helped save lots of lives and money in developing countries.
（4）What will Dasia's future career probably involve？ CC
A．Medical and health work.
B．Medical device development.
C．Something about the legal aid.
D．Medical and science research.
【答案】C；D；C；C
【解答】
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發(fā)布：2024/4/20 14:35:0組卷：2引用：5難度：0.5
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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.
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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.
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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.
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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．You run into the grocery store to quickly pick up your item.You grab what you need and head to the front of the store.After quickly sizing up the check-out lines，you choose the one that looks fastest.You chose wrong.People getting in other lines long after you have already checked out and headed to the parking lot.Why does this seem to always happen to you？
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（1）What phenomenon is described in the first paragraph？
A．Queuing in a line.
B．A shopping experience.
C．A rush in the morning.
D．Cutting in a line.
（2）According to the article，what may cause delays in checking out？
A．The lack of employees in the grocery store.
B．Some unexpected delays of certain customers.
C．The increasing items bought by customers.
D．A worsening shopping system of the store.
（3）What is the solution given by mathematicians？
A．Employing more workers for checking out.
B．Limiting the number of queuing people.
C．Making only one line available.
D．Always standing in the same line.
（4）What's the principle behind the queuing theory？
A．To pursue the maximum benefit.
B．To leave success or failure to luck.
C．To avoid the minimum loss.
D．To spread the risk equally among everyone.發(fā)布：2025/1/1 17:30:2組卷：2引用：2難度：0.5
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