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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(称重) for a week in a recent study.
They had regular backpacks with two straps (带子) to carry them,but a number of students with heavy loads had switched to rolling backpacks (which have wheels and can roll on the ground).Shirley Park,whose backpack weighed 10kilograms,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 10-15% of their own body weight.
A few students had one suggestion to lighten the load(负重):less homework.
P.S.(附) Doctor's suggestion:
①Lighten the load.Clean out binders (活页材料) and take home only the books you need that night.
②Wide straps are better.They send out the weight over your shoulders more evenly (均匀).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) What is the main idea of the text? ______
A. The problem of backpacks is worth studying.
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B. Students suggest less homework.
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C. What is the best backpack for a student.
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D. How to make students'backpacks light.
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(2) According to Oberlin Reyes and Shirley Park,we know ______ .
A. students have to do too much homework
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B. students have to carry heavy backpacks
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C. backpacks without wheels are bad for students
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D. too much homework leaves students no free time
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(3) The expression"switched to"in the text perhaps means ______ .
A. started to use | B. turned into | C. caught up | D. used for
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(4) According to the passage,it's better for a student of 40 kilograms to carry a backpack of ______ at most by the words of experts.
A. 10kg | B. 8kg | C. 6kg | D. 7kg
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(5) If students follows the doctor's suggestions,they ______ .
A. may lighten their backpacks
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B. can learn how to help themselves
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C. may feel their backpacks are lighter
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D. will know how to wear backpacks. |