Question

閱讀理解 　　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 had switched to rolling backpacks(which have wheels 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 suggestion： 　　① Lighten the load．Clean out binders(活頁材料)and take home only the books you need that night． 　　② Wide 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． 　　③ Pack smart．The heavier things should be packed closed to the back． 　　④ Bend both knees when you pick up the pack, and don’t just bend over at the waist(腰)． (1) “________” 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 Enderlin Reyes and Shirley Park, we know ________． [　　] A． students have to do too much homework B． backpacks have to carry heavy 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 ________． [　　] A． started to use B． turned to 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 ________ at most by the words of experts． [　　] A． 10 kg B． 8 kg C． 6 kg D． 7 kg (5) If students follow the doctor’s suggestions they ________． [　　] A． may lighten their backpacks B． can learn how to help themselves C． may feel their backpacks are lighter D． will know how to wear backpacks

Answer 1

答案：1．D;2．A;3．A;4．C;5．C;
解析：

(1)	根據首段末句及所附醫生的建議可知選項D乃是文章主旨．
(2)	短文前兩句是本題答案之所在．
(3)	根據該詞組所在句子及上下文意思，“許多學生使用帶有輪子，可在地上滾動的書包”可以推測選項A的解釋合乎文意．
(4)	專家建議學生書包重量應在他本人體重的10％和15％之間．所以一個體重為40千克的學生所背書包的重量應是6千克．
(5)	顯然，專家所提四項建議的目的是讓學生的書包輕一些． 　　這篇短文反映了學生書包過重這一引發人們思考的生活現實．書包過重引起了學生身體的不適．文中引用了幾位學生對沉重書包的感想和體會，有的學生甚至還在書包上安裝了輪子．專家認為書包重量不應超過學生體重的10％-15％．學生則認為減少作業量才能徹底解決這一問題．為了減小過重書包對學生身體造成的傷害，短文最后還附了醫生的四點建議．