以下运动属于平移运动的是（ ） A．彩旗飘飘 B．荡秋千 C．电梯升降 D．折纸

阅读理解。

     Many of us don't pay much attention to the importance of eye care. It is said that if you take care of

your body, then you can surely be healthy. That is why our eyes should be given a lot of care. Natural eye

care should be put in a number one place.

     There are several causes leading to poor eyesight like not enough food, genes (基因) and aging (老化).

Televisions, computers and reading are also the causes of having poor eyesight. If you happen to work in

front of the computer, it is best to take a break every once in a while. Something dirty can cause redness and

they will make you feel uncomfortable. It is bad for your eyes, too. If this happens, the best way is to clean

your eyes by using cold water. You must also try your best to protect your eyes from harmful things. For

example, sunglasses are not just for fashion but they can also serve as a great way to protect your eyesight

form UV rays.

     Eating healthy foods will do good to your eyesight. Remember that vitamins A, C and E are good for eyes.

Try to eat food groups that have these vitamins. And you should do eye exercises because exercise protects

your eyesight, too. If a person exercises regularly (定期地) and eats the right kind of food, his eyes will stay

in good condition for a long time.

     All above are natural ways of eye care that help us keep healthy eyes. Being happy all the time can be

helpful to a person's eyesight, too. In a world, eye care is very important, no matter how old a person is.

1. _______ is the most important way to protect our eyes.

A. Natural eye care

B. Taking medicine

C. Seeing the doctor

D. Being happy all the time

2. All the following causes can lead to bad eyesight except _______.

A. age

B. height

C. reading

D. computers

3. What should you do if you have to work in front of the computer?

A. Eat healthy foods.

B. Clean the eye by using cold water.

C. Wear a pair of sunglasses.

D. Have a rest after working for a while.

4. What do the underlined words "UV rays" mean?

A. 沙尘

B. 闪电

C. 紫外线

D. 超声波

5. Which is the best title of the passage?

A. Ways of Eye Care

B. Ways of Eye Exercises

C. Ways of Being Happy

D. Ways of Being Healthy

当前我国的电信普遍服务政策通过（）的方式实施。

A.收取接入亏损补偿

B.国家补偿

C.政府指定企业承担普遍义务

D.普遍服务金

儿童时期病理性骨折最常见的原因是

A．转移性骨病变

B．良性骨囊肿

C．废用性萎缩

D．佝偻病

E．成骨不全

物质文化与非物质文化具有何种关系？

安全生产两大体系是什么？