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
130
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.
How can sunglasses reduce the amount of sunlight entering children’s eyes?
选项
答案
The lenses should be large enough to protect the eyes from most angles and to block light that gets in around the frames. The sunglasses should also fit the children’s nose.
解析
转载请注明原文地址:https://kaotiyun.com/show/WLLC777K
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
设函数f(u)连续,而D:x2+y2≤4,且_______。
Forthispart,youareallowed30minutestowriteacompositiononthetopic"THETEACHER-STUDENTRELATIONSHIP".Youshouldwri
Someofthestudentsinhisclassseem______todotheirassignments.
Historianscan’ttelluswhen,whereor【71】thefirstfoodwascooked.Inearliest【72】whenpeoplehadeatentheirfood【73】,
Afterhisrecoveryfromtheillness,hemadeuphismindtogiveupsmokingforgood.
She’s______(fortune)enoughtoenjoygoodhealth.
Someyearsagothecaptainofashipwasveryinterestedinmedicine.Healwaystookmedicinebookstoseaandlikedtotalkabo
Itwouldbedifficulttohaveasocietylikeourswithoutpublicgoodssuchasdefense,transportation,andotherservices.
Computeris______(universe)regardedasarevolutionaryinventionof20thcentury.
随机试题
怎样焊接12Cr2MoWVTiB钢管?
对慢性肺源性心脏病患者进行护理,措施不正确的是
腰椎前后斜位片上,腰椎椎体以外的结构(椎弓及附件)投影形似小狗,如图示,其对应解剖关系为A.“狗眼”B.“狗耳”C.“狗颈”D.“前腿”E.“后腿”近片侧椎弓峡部
劳动者在试用期内单方解除劳动合同,应提前()日通知用人单位。
下列关于风险预警方法的说法巾,正确的有()。
甲企业为居民企业,主要从事服装的生产与销售。2014年有关经营情况如下:(1)取得销售货物收入9000万元,技术服务收入700万元,出租设备收入60万元,出售房产收入400万元,国债利息收入40万元;(2)缴纳增值税900万元,消费税20万元,城建税及
对于Ⅰ类供应商,其业绩至少应达到________。
实践是检验真理的唯一标准,这主要是因为()。
王某在大街上遛狗。张某故意挑逗狗,之后跑掉,结果狗将路过的孙某咬伤,并继续追赶孙某。王某为阻止狗继续伤人,在狗不听使唤的情况下,用木棍将狗的腿打断。对此,下列表述正确的是()。
设n元(n>3)线性方程组Ax=b,其中试问a满足什么条件时,该方程组有解、无解?有唯一解时求出x1;有无穷多解时,求其通解.
最新回复
(
0
)