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
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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.
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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.
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A.They make new books.
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A.By using numbers.
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A.China did better in reusing old textbooks than the US.
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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 -
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D.By giving examples.發布:2025/1/5 9:30:5組卷:2引用:1難度:0.3 -
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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.
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D.College mobile apps.發布:2025/1/5 9:30:5組卷:5引用:1難度:0.5