首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
专升本
Sunglasses can help your eyes in two important ways. They improve the normal light filtering abilities of your eyes and they pro
Sunglasses can help your eyes in two important ways. They improve the normal light filtering abilities of your eyes and they pro
admin
2007-12-30
118
问题
Sunglasses can help your eyes in two important ways. They improve the normal light filtering abilities of your eyes and they protect against the sun’s damaging rays. Good sun glasses will reduce strong light, filter out(滤除)99 to 100 percent of ultraviolet( UV)rays(紫外线) , provide visual protection, comfortable and not distort colors.
The UV rays in sunlight can damage your eyes, some of the damage can be immediate while some occurs over a life time of exposure.
Good quality sunglasses help to protect your eyes from harmful UV radiation. It is generally agreed that the less UV rays that get through, the better. Experts recommend that to protect your eyes from harmful rays, your sunglasses should block 99 to 100 percent of both UV-A and UV-B rays. Furthermore, lenses should block at least 70 percent of visible light but even this can vary with the situation. In areas where light is strong such as at the beach or on snow, as little as 10 to 15 percent of transmission is better.
Selecting the right sunglasses is an important choice to protect your eyes and your vision(视力) . When selecting sunglasses for children, keep the following suggestions in mind.
Check the sunglasses often to make sure they fit well and are not damaged. Children often don’t tell about their vision even when there’s a problem, so a regular check may be necessary.
Select sunglasses that suit children’s active lifestyles. The glasses should be impact (冲撞) resistant, and the frames should be bendable, unbreakable. Children’s sunglasses should never be made of glass, unless required by their eye doctors.
The lenses should be large enough to protect the eyes from most angles ( above, below and either side) and to block light that gets in around the frames. The sunglasses should fit the child’s nose, to reduce the amount of sunlight that enters the eyes.
Unless required by eye doctors, why should children’s sunglasses never be made of glass?
选项
答案
Because the children ’s glasses should be impact resistant.
解析
转载请注明原文地址:https://kaotiyun.com/show/PLLC777K
本试题收录于:
英语题库普高专升本分类
0
英语
普高专升本
相关试题推荐
设f(x)在点x=0处连续,则x≠0,,则f(0)=________.
Historianscan’ttelluswhen,whereor【71】thefirstfoodwascooked.Inearliest【72】whenpeoplehadeatentheirfood【73】,
ThefollowingisthecontentsofabooknamedPublicRelations.Afterreadingit,youarerequiredtofindtheitemsequivalent
Anyacademicbreakthrough,brilliantasitmaybe,doesnotautomaticallyensurethatitcanbeappliedtopractice.
Acontractisanagreementbetweentwoormorepeople【71】onepersonagreestodosomethingbyaspecifieddateinreturnfors
Iwas15whenIwalkedintoMcCarley’sBookstoreinAshland,Ore.,andbeganscanningtitlesontheshelves.Themanbehindthe
Nowadaysmostcompaniesdon’tjudgeanemployeesimply根据其所受教育。
Someyearsagothecaptainofashipwasveryinterestedinmedicine.Healwaystookmedicinebookstoseaandlikedtotalkabo
Itiseasyto______onestateofmatterfromanother.
(非英语类学生必做)Summerswithfatherwerealwaysenjoyable.Swimming,hiking,boating,fishingthedayswerenotlongenoughtoco
随机试题
电子商务最发达的美国早在(),已通过了《高性能计算机法规网络案》,其宗旨是建设信息高速公路。
A.6-磷酸果糖→1,6-双磷酸果糖B.3-磷酸甘油酸→丙酮酸C.丙酮酸→乳酸D.6-磷酸葡萄糖→6-磷酸果糖E.丙酮酸→乙酰CoA
A、门庄B、朱砂点C、翻口似盆状D、通天眼E、马头蛇尾瓦楞身花鹿茸鉴别的术语是
我国《宪法》规定公民的住宅不受侵犯。下列哪些选项属于便犯公民住宅的行为?(卷一/2008年第60题)
“因材施教”是人的发展的()对教育的要求。
CSMA协议可以利用多种监听算法来减小发送冲突的概率,下面关于各种监听算法的描述中,错误的是()。Ⅰ.非坚持型监听算法有利于减少网络空闲时间Ⅱ.1一坚持型监听算法有利于减少冲突的概率Ⅲ.P一坚持型监听算法无法减少网络的
下列各项中对“信息”理解不正确的一项是:根据文意,以下与信息的概念产生无关的是:
设X与Y是独立同分布的随机变量,均服从参数为p(0<p<1)的几何分布,求Z=max{X,Y}的概率分布。
Mostworthwhilecareersrequiresomekindofspecializedtraining.Ideally,therefore,thechoiceofan【C1】______shouldbemade
Colorisveryimportanttomostanimalsforithelpsthemtogetalongintheworld.Color【C1】______tomakeananimaldifficult
最新回复
(
0
)