Areyoucarryingtoomuchonyourbackatschool?I’msurelots...

习题库
关注：5.85K次

问题详情：

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 about young students’ back and neck, because their schoolbags are too heavy for them.

“It’s hard for me to go upstairs with my heavy bag.” Said Rick Hammond, an 11-year-old students in the US.

Rick is among students who have schoolbags with two straps（带子）, and many other students choose rolling（有滚轮的） bags.

But even with rolling bags, getting upstairs and buses is still a problem for children. Doctors say students should carry no more than 10% to 15%of their own body weight.

Scott Bautch, a back doctor, said children under Grade 4 should carry no more than 10%of their weight and older children shouldn’t stay with over15%,because their bodies are stillgrowing.

Teachers and parents should do some things to help children. And the best answer is to have less homework.

( ) the passage we can know that .

A. only children in China carry too heavy school bags

B. children in other countries don’t carry too heavy bags

C. both children in China and the US carry too heavy school bags

D. only children in US carry too heavy school bags

( ) dren feel it hard for them to go upstairs because

A. they are too young B, their school bags are too heavy

C. they are too heavy D. their parents don’t always go upstairs with them.

( ) a child carries a heavy school bag,

back and neck may be hurt B. his head and arms may be hurt

hands may be hurt D. his feet may be hurt