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题型:阅读选择 题类:常考题 难易度:普通

Are you carrying too much on your back at school? You're not alone. Back experts(专家) in the USA are worried about that young students are having back and neck problems because they are carrying too much in their backpacks .
“It hurts my back when I run,” said Ebelin Reyes, a student in Virginia. “It's hard to get up the stairs with my backpack because it's too heavy.” Students have to carry heavy backpacks on their backs for a whole week's study. Ebelin is one of them. They have regular(固定的)backpacks with two straps(带子) to carry them, but a number of students with heavy loads(负担) have switched to rolling backpacks. The backpacks have wheels and can roll on the ground. Shirley Park's backpack weighs 10 kilos, and she said, “I'll change to a rolling backpack because I am starting to have back pain.”
How much is too much? Experts say that students should carry no more than 10% to 15% of their own body weight. A few students have had a good idea to lighten(减轻) the load: less homework.
Doctor's suggestions:
Lighten the load. Take home only the books the students need that day.
(2) Wide straps are better. They can send out weight over your shoulders (肩)and be sure to wear backpacks with two straps.
(3) The heaviest things should be packed closest to the back.
(4) Bend(弯曲) both knees when you pick up the pack, don't just bend over the waist(腰).

(1)、The main idea of the passage is about _______.

A、the problems made by rolling backpacks B、the advantage of backpacks C、the best backpacks for students D、how to lighten students' backpacks
(2)、From what Ebelin Reyes and Shirley Park said, we know______.

A、students like to carry heavy backpacks B、students have to do a lot of homework C、backpacks with wheels are bad for students D、students have no time to play because of heavy backpacks
(3)、The underlined word “switch to” means______.

A、use for B、turn to C、catch up D、begin to use
(4)、According to the experts, it's better for a student of 40 kilos to carry a backpack of ____ at most.

A、10 kilos B、8 kilos C、6 kilos D、7 kilos
(5)、If students follow the doctor's suggestions, they______.

A、may do less homework B、may feel their backpacks are lighter C、can learn how to enjoy themselves D、will know why to wear heavy backpacks
举一反三
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Are you a fan of spending your lunch breaks in a park? Or do you walk your dog in a park? Well, we have good news: spending just 20 minutes in a park every day will make you happier and less stressed.

New studies have suggested the benefits of spending time in parks. Researcher Mary Carol Hunter said," For lowering levels of the stress, you should spend 20 minutes sitting or walking in a place that provides you with a sense of nature. You don't have to travel to the wild lands. Getting out of an office block and sitting next to a tree can be enough."

A study from University of Alabama found people who visited their local urban parks felt happier. Researcher Hon Yuen sai," We did not find levels of physical activity are related to improved emotional well- being(幸福; 健康). Instead, we found time spent in the park is related to improved emotional well- being." The results are perhaps unsurprising— many studies have stressed the benefits of nature on a person's mental health. Therefore, nature- based activities can contribute to decreasing stress level.

King's College London researchers found being outdoors, seeing trees, hearing birdsong, and feeling in contact with nature were related with higher levels of mental well- being. Another research suggested that children growing up with greener surroundings have 55% less risk of developing mental diseases.

All of these studies mention the need for designing greener cities for the future and protecting our existing parks." There is increasing pressure on green space in cities," said Gavin Jearan, co- author of the urban parks study.

"I am worried because developers look to replace green space with tall buildings. The challenge facing cities is that there is increasing evidence about the value of city parks but we continue to see the disappearing of these spaces."

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