A new study，a project of the researchers from the University of Pittsburgh in Pennsylvania，finds that a fitness tracker （健康追蹤器） probably does not help with weight loss．
The trackers are designed to record your physical activity．They are usually worn around the wrist （手腕），where they record a person's heart rate．The research team looked at two groups of people．The first wore a fitness tracker and took part in health consultation with experts for best weight-loss plan．The researchers compared this group with people who only got health consultation．
The study found that those only speaking with the health experts lost nearly 6 kilograms，but those using a fitness tracker lost only 3.5 kilograms．John Jakicic，the lead researcher，questioned the use of these trackers for weight loss．
The study involved 470 people aged between 18 and 35．Some of them were overweight，while others were considered obese．Over three fourths of them were women．All were told to increase physical activity and start on a low-calorie diet．They had their weight measured once every six months．After six months，researchers divided the group into two parts：one continued with monthly consulting，while members of the other group were given a fitness tracker．Eighteen months later，both groups showed great improvements in fitness，physical activity and diet，with no big difference between groups．However，when it came to losing weight，the people who only spoke with experts lost nearly twice as much weight．
Jakicic said， "The study's findings are important because effective long-term treatments are needed to deal with America's obesity．" More information is needed，he added，to learn how to best use these trackers to help adults who want to lose weight．
（1）Both groups of people in the study were asked toCC．
A．start on a high-calorie diet
B．wear a fitness tracker
C．consult experts
D．record their heart rates
（2）Why does Jakicic think the findings are important？CC
A．Wearing fitness trackers hardly helps people lose weight．
B．Physical activity and diet have no effect on weight loss．
C．Dealing with obesity needs effective long-term treatments．
D．There are great differences in health between both groups．
（3）What can we infer about the study mentioned in the text？AA
A．The study went on for about two years．
B．More than 120 men took part in the study．
C．Health consulting helps lose almost 6 kilograms．
D．Wearing a fitness tracker is useful for keeping slim．
（4）The purpose of the text is toBB．
A．describe how the researchers carried out the study
B．show regular consulting for weight control is necessary
C．persuade readers to wear fitness trackers for weight control
D．warn women are more likely to suffer from weight problems
【考點(diǎn)】日常生活．
【答案】C；C；A；B
【解答】
【點(diǎn)評(píng)】
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發(fā)布：2024/5/27 14:0:0組卷：19引用：3難度：0.4
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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
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（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：23引用：3難度：0.5 -
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（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.
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（2）Why did the writer refer to her friend's story？
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A．Queuing in a line.
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A．The lack of employees in the grocery store.
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D．A worsening shopping system of the store.
（3）What is the solution given by mathematicians？
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（4）What's the principle behind the queuing theory？
A．To pursue the maximum benefit.
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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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