Are you carrying too much on your back at school？You're not alone．Back experts in the United States are worried that young students are having back and neck problems as a result of carrying too much in their backpacks （schoolbags）．
"It hurts my back when I run，"said Oberlin Reyes，a student in Virginia．"It's hard to get up the stairs with my backpack，because it's too heavy．"
Oberlin is among students whose backpacks were weighed for a week in a recent study．
They had regular backpacks with two straps （帶子） to carry them，but a number of students with heavy loads（負荷）had switched to rolling backpacks，which have wheels（輪子） and can roll on the ground．
Shirley Park，whose backpack weighed 10 kilograms，said she changed to a rolling backpack because she was starting to have back pain．
How much is too much？Experts say students should carry no more than 10 to 15 percent（%） of their own body weight．
A few students had one suggestion to lighten the load：less homework．
P．S．（附） Doctor's suggestions：
①Lighten the load．Clean out binders （活頁材料） and take home only the books you need that night．
②Wide straps are better．They send out the weight over your shoulders more evenly （均勻）．And be sure to wear both straps rather than hanging the pack over one shoulder．
③Pack smart．The heavier things should be packed closed to the back．
④Bend both knees when you pick up the pack，and don't just bend over at the waist （腰）．
（1）" DD"is the main idea of the text．
A．The problem of backpacks is worth studying
B．The problem made by heavy backpacks
C．What is the best backpack for a student
D．How to make students' backpacks light
（2）According to Oberlin Reyes and Shirley Park，we can guess AA．
A．students have to do much homework
B．students like different kinds of backpacks
C．backpacks without wheels are bad for students
D．too much homework leaves students no free time
（3）The expression"switched to"in the text perhaps means BB．
A．given up
B．started to use
C．caught up
D．used for
（4）According to the passage，it's better for a student of 40 kilograms to carry a backpack of AA at most by the words of experts．
A．6 kg
B．7 kg
C．8 kg
D．10 kg
（5）If students follow the doctor's suggestions they CC．
A．may take off their backpacks
B．can learn how to help themselves
C．may feel their backpacks are lighter
D．will know how to wear backpacks．
【考點】教育．
【答案】D；A；B；A；C
【解答】
【點評】
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發布：2024/6/27 10:35:59組卷：2引用：2難度：0.9
相似題
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1．Most of your textbooks are single use.After graduating，old text books are thrown away，which is a big waste of money and paper.
Many countries already reuse their textbooks.In the US，book companies will come to schools and buy used books.They then resell them to new students the following year at a lower price.A high school textbook in the US can have up to eight owners before it is no longer in a good enough condition to be used，according to Xinhua.The book can then be recycled.
In China，according to the National Press and Publication Administration，students across the country buy 2.8 billion new textbooks every year.If the students of the following year could reuse these textbooks，it would save over 20 billion yuan each year.That's enough money to build 40，000 primary schools，China Daily noted.
Primary and junior high school students in several Chinese cities are reusing music，arts，science and IT textbooks.That's because students don't have to take down many notes in their textbooks for these subjects，which makes them suitable for reusing.
However，these books only account for a tiny part of the total number of textbooks.As there is no good way for redistributing" second-hand textbooks，most textbooks still end up as waste，the Paper reported.
Changes in curricula also make it hard to reuse textbooks. "I'm among the first group of students to take classes after the recent curricular reform，so I have to buy new textbooks that previous students didn't use，" Sun Run，a high school student from Hangzhou.
Though China has met difficulties on the way to reusing textbooks，the government need to do something to push the second- hand textbook business in the schools.We should go ahead with the project for the future development.
（1）How do book companies in the US help students reuse textbooks？
A．They make new books.
B．They repair used books.
C．They carry them to rubbish station.
D．They buy used books and then sell them.
（2）How does the writer show the importance of reusing textbooks in Para.3？
A．By using numbers.
B．By giving examples.
C．By asking questions.
D．By telling stories.
（3）What do the underlined words "these books" in Para.5 refer to？
A．All the reused text books.
B．All the new textbooks.
C．The second-hand text books.
D．Music，arts，science and IT textbooks.
（4）What can we infer（推測） from the above passage？
A．China did better in reusing old textbooks than the US.
B．Throwing old textbooks is a waste of money and paper.
C．It seems that China makes a little progress in reusing old textbooks.
D．Sun Run has already reused the textbooks because of the recent curricular.發布：2025/1/5 9:30:5組卷：4引用：1難度：0.5 -
2．Do you have to wear uniforms to school every day？Do you like them or you just want to wear your own clothes？Many students just wonder why they can't wear whatever they like，for teenagers want to be different from others.
In fact，there are several reasons why school uniforms are a good idea.First of all，uniforms help the school look smart.The students feel that they belong to a particular" group.When every student in the school wears the uniform，nobody has to worry about fashion.Everybody wears the same style of clothes.Uniforms can be useful in unexpected ways.A school in Ireland has introduced an interesting new uniform.On the edge" of the jacket，there is a piece of cloth which gives off light in the dark.When the children are walking or cycling to school on dark mornings，car drivers can easily see them.
But can uniforms help improve school standards？The answer to this question is not clear.
One study in America found that students' grades improved a little after the school introduced uniforms.But some students didn't want to wear the uniform.Other American studies showed that uniforms have nothing to do with the school performance.
School uniforms are traditional in Britain，but some schools are starting to get rid of them.Students of some very good schools do not have to wear uniforms now.However，uniforms are still popular.Pupils at about 90 percent of British secondary schools wear uniforms.
（1）Where are the interesting and useful uniforms from according to the passage？
A．Ireland.
B．America.
C．China.
D．Britain.
（2）Why can the new uniform be useful？
A．The whole jacket can give off light in the dark.
B．Students can wear it on dark mornings.
C．Students can wear it to walk or ride bikes.
D．It can make drivers see the students easily in the dark.
（3）How does the writer start this passage？
A．By asking questions.
B．By listing facts.
C．By showing numbers.
D．By giving examples.發布：2025/1/5 9:30:5組卷：2引用：1難度：0.3 -
3．Educational technology such as apps can help students with time management，organization skills，study skills，homework and more.Below is a list of apps for college students recommended by educational technology experts.The needs of individual students differ and experts suggest that students try out several apps to find the right one.Unless costs are noted in the app descriptions below，these learning tools are free to users：
Blackboard App.A popular learning management system，Blackboard is used at many colleges across the U.S.It allows students to get coursework for online classes or in- person classes.Students can view course content，complete assignments and tests，view grades and more.
Duolingo.Advertising itself as "the world's best way to learn a language ，" Duolingo offers lessons in 35- plus languages，helping users with speaking，reading，listening，writing，grammar and vocabulary.Duolingo offers both free and paid versions，the latter with an ad-free experience and offline access to lessons.
Evernote.A note-taking and task- management system that offers the ability to sync across devices.Evernote allows users to create to do lists，save webpages and change documents into a digital form via a device's camera.Evernote is free，though an advanced version with more features costs ＄7.99 a month or ＄ 69.99 a year.
College mobile apps.College- specific apps have become fairly common among U.S.college students.While these apps may differ by college，users can often find campus maps，news，safety information，scheduled events and more.
（1）Why do students need to try out several apps？
A．To avoid paying for any app.
B．To apply these apps to different tasks.
C．To see as many different functions as possible.
D．To find one that can best meet their needs.
（2）What do the listed apps have in common？
A．They cannot be used continuously until paid.
B．They can help college students learn better.
C．They have different versions for college students.
D．They have been quite popular among college students.
（3）Which app will you choose if you want to make a to do list？
A．Blackboard App.
B．Duolingo.
C．Evernote.
D．College mobile apps.發布：2025/1/5 9:30:5組卷：5引用：1難度：0.5