当x=-2时，二次根式5-2x的值为（ ） A．1 B．±1 C．3 D．±3

阅读下面短文，根据内容完成表格中所缺信息。（每空一词） 
It is said that the eyes are the windows of our soul. Beautiful and bright eyes not only show a good health but also make you look very attractive. However, to have healthy eyes you have to look after them properly. Yours eyes need everyday attention.
Pay more attention to your diet. First, eat food that is good for your eyes. They are fresh fruits and vegetables as fish, eggs, and milk. Besides, a regular amount of vitamins A and B2 should also be taken.
A regular and enough sleep is necessary. It relaxes the eye muscles（肌肉）and gives them the rest required. Sleep not only helps the body to repair its tired tissues (组织). Usually, you must sleep for at least seven to eight hours every day. Loss of sleep can give you dark circles under the eye.
You must exercise your eyes every day. Blink (眨眼) yours eyes at regular periods（周期）, which makes the eyeballs watery, and gives them a good wash.
We use our eyes in many unnoticeable and wrong ways. Fox example, if a small thing goes into our eye we start rubbing it, which is wrong. Rubbing can cause damage(伤害) to your eyes. Don’t read or write in poor or bright sunlight. Always use sunglasses as sunlight can cause eye tiredness. Light should not shine directly（直接）in your eyes. Reading, writing, watching television or working on the computer for too long without a rest can also cause eye tiredness.
Remember to always look after God’s most beautiful gift to you. Your life will be very colourless without your eyes.

小题1:  to keep your eyes healthy	小题2:	●Eating food good for your eyes,  小题3: as fresh fruits, vegetables and food high in protein（蛋白质）. ●Taking a proper amount of Vitamins A and B2 regularly.
	Sleep	●Having a regular and enough sleep is   小题4: ●Reducing loss of  小题5: .
	Eye exercising	●Having your eyes exercised every day. ● 小题6: your eyes at regular periods makes the eyeballs watery .
	Eye using	●It’s  小题7:  to rub your eye when something goes in. ●Read or write in soft sunlight. ●Light should never shine in your eyes 小题8:  . ●Take a 小题9: after reading, writing, watching TV or working on the computer for too long .
Remember to always take 小题10: of God’s most beautiful gift to you