发布时间 : 星期五 文章最新-2018年北京市顺义区中考二模英语试题及答案 精品更新完毕开始阅读
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 4 should 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 that__________.
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, his___________ 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 5 weighs about30 kilos, the school bag he carries should not be over________ kilos
A. 3 B. 4.5 C.5 D. 5.5
D
A new study suggests that the more teenagers watch television, the more likely they are to develop depression as young adults. The researchers used a national long-term survey of healthy young teenagers of about 13-16 to find out the relationship between media use and depression. They based their findings on more than4000 young teenagers who were not depressed when the survey began in 1995.
As part of the survey, the young people were asked how many hours of television or videos they watched daily. They were also asked how often they played computer games and listened
to the radio.
Here was the result. The young people spent five and a half hours a day using media and more than 2 hours of that was spent watching TV.
Seven years later, in 2001, more than 7% of the young people had signs of depression. The average age at that time was 21. Brian Primack at the University of Pittsburgh medical school was the lead authorof the new study. He says every extra hour of television meant an 8% increase in the chances of developingsigns of depression.
The researchers say they did not find any such relationship with the use of othermedia such as movies,video games or radio. But the study did find that young men were more likely than young women to developdepression given the same amount of media use.
Doctor Primack says the study did not find out if watching TV causes depression directly. But one possibility, he says, is that it may take time away from activities that could help prevent depression, like sports and social activities. It might also prevent a person from sleeping well, he says, and that could have an influence.
The study was just published in the Archives of General
Psychiatry.
In December, the journal Social Indicators Research published a study of activities that help lead to happylives. Researchers from the University of Maryland found that people who describe themselves as happy spend less time watching television than unhappy people. The study found that happy people are more likely to be socially active, to read, attend social services and to vote.
56. Who was in charge of the new study of depression?
A. Maryland B. Pittsburgh C. Brian Primack D. General Psychiatry
57. What does the word “depression”mean? It’s a kind of _____. A.vote B. study C. sportsD. disease
58. In 2001, more than ______ young people in the research had
got the signs of depression.
A. 7 B. 21 C. 280 D. 4000 59. What does the writer want to tell us?
A. Thescientific research can prevent people from having
depression.
B. People are sure to benefit from watching TV less while taking
activities more.
C. Giving up all the uses of media and this will make you