3.Are you carrying too much on your back at school?I'm sure lots of children of your age will say"yes".Not only the students in China have this problem,but children in the United States also have heavy school bags.
Doctors are starting to worry that younger and younger students are having back and neck problems as a result of school bags being too heavy for them.
"It's hard for me to go upstairs with my bag because it's so heavy,'said Rick Hammond,an 11-year-old student in the US.
Rick is among students who have common school bags with two straps to carry them,but many other students choose rolling bags.
But even with rolling bags,getting up stairs and buses is still a problem for children.Many of them have hurt their backs and necks because of the heavy school bags.
But how much is too much?Doctors say students should carry no more than 10% to 15% of their own body weight.
Scott Butch,a back doctor,said children under Grade 4should stay with 10%,but it is also important that older children don't stay with over 15%,because their bodies are still growing."Children are losing their balance and falling down with their school bags,:"he said.
Parents and teachers are starting to tell children to only take home library books they will be reading that night.Some teachers are using pieces of paper or thin work books for students to take home.
One of the best answers is,as some children said,to have no homework at all!
53.From the passage we can know thatD.
A.only children in China carry too heavy school bags
B.only children in the US carry too heavy school bags
C.children in other countries don't carry too heavy bags
D.both children in China and the US carry too heavy school bags
54.If a child carries a heavy school bag,hisC will be hurt.
A.hands
B.feet
C.back and neck
D.head and arms
55.According to the doctor,Scott Butch,if a child in Grade 5weighs about30kilos,the school bag he carries should not be overB kilos
A.3
B.4.5
C.5
D.5.5.
分析 本文讲的是书包太重给学生带来的问题.
解答 53.D细节理解题.根据Not only the students in China have this problem,but children in the United States also have heavy school bags可知不但中国学生有书包太重这个问题,而且美国也有,故选D.
54.C细节理解题.根据第二段younger and younger students are having back and neck problems as a result of schools bags being too heavy for them可知是学生的背部和颈部出现了问题,故也受到了伤害,故选C.
55.B计算题.从文中Doctors say students should carry no more than 10% to 15%及don't stay with over 15%可知,最大的承受量是30*15%=4.5,故选B.
点评 做题时要在理解好文意的基础上,与题目有机的结合,从文章中找到相关细节性的句子与选项细细比对,进行选择或推理判断,选出符合文章内容的正确选项.做题注意灵活,有时可采用排除法或直选法确定出最终答案.