更多"Some Schooling on Backpacks
Acco"的相关试题:
[单项选择] Some Schooling on Backpacks
According to the U.S. Consumer Product Safety Commission. 5.900 kids were treated at hospital emergency rooms, clinics, and doctors’offices last year for sprians(扭伤)and strains caused by backpacks. Such injunes are so widespread that more than 70 percent of physicians as a potential clinical problem for children.
How do you avoid such problems Choose bags that have wide, padded straps(有垫的背带)and a belt. That will help transfer some of the weight from the back and shoulders to the hips. You should also tighten both straps firmly, so the pack rests about 2 inches above your waist. Also, remember to pack your bag with the heaviest items closest to your back and to bend both knees when you pick it up.
I low much should you stuff into your pack That depends on your size and strength, but a general rule is not to exceed 20 percent of your body weight. So if a child weights 100 pounds, the backpack and its load should not be more
A. Right
B. Wrong
C. Not mentioned
[填空题]According to some functional linguists, some utterance has no meaning at all if it is out of the context of ______.
[单项选择]According to some scientists, Hemps are preferable to trees chiefly because
A. they are more easily cultivated.
B. they have been cultivated by many cultures for a long time.
C. they can produce more paper than trees.
D. they can provide more endurable fibers than trees.
[填空题]According to some scientific research, smoking will (short) _____ a person’s life greatly.
[单项选择]According to some educators, the goal of teaching is to help students learn what （ ） to know to live a well-adjusted and successful life.
A. do they need
B. they need
C. they are needed
D. as they may need
[填空题]According to some experts in fitness those who have no disease are healthy.
