首页
登录
职称英语
[originaltext] On December 25, 2000,. many Pe0Ple across North America receiv
[originaltext] On December 25, 2000,. many Pe0Ple across North America receiv
游客
2025-01-08
1.6K+
管理
问题
On December 25, 2000,. many Pe0Ple across North America received a rare Christmas treat when the moon passed in front of the sun resulting in a partial solar eclipse.
Solar eclipses occur when the moon passes between the earth and the sun, and the moon’s shadow covers part of the earth, and a total solar eclipse takes place when the moon’s shadow blocks out the sun entirely~ What made this particular solar eclipse unique was that such an event has occured on December twenty - fifth only 30 times during the past 5000 years, the last time in 1954. But people must be exceptionally careful when attempting to view a solar eclipse. Without taking precautionary measures, one can permanently damage the retina of the eyes; however, there are several safe methods of witnessing this heavenly marvel.
First, you can view a solar eclipse by using eclipse safety glasses for filtering out the sun’s harmful rays. They should-be used when any part of the sun is visible. Sunglasses can block out some of the sun’s ultraviolet rays, but the results can be very deceptive. The eye’s natural reaction to this darken state when wearing sunglasses is to make the pupil larger, which allows in more light and can intensify the damage to your eyes. You can also watch an eclipse by pro- jecting the sun’s image on a piece of paper either by using a telescope, or easier yet, by creating a pinhole in a piece of paper and viewing the result on another piece of paper, thus called a pinhole projector.
Only during a total eclipse when the sun is completely and briefly covered can you watch the eclipse without eye protection. Even then, extreme caution should be taken. In case you didn’t catch this last spectacular eclipse on December twenty - fifth, 2000, there’s no need to fret. Your posterity can record the next eclipse on Christmas in the year 2307, but only if their visiting the west coast of Africa for the holidays.
选项
A、Sunglasses block out only a limited amount of the sun’s ultraviolet rays that can damage the eye.
B、Sunglasses can only filter harmful rays during total solar eclipses at their greatest magnitude.
C、Sunglasses tend to cause the center of the eye to enlarge allowing in more intense light.
D、Sunglasses should be used when any part of the sun is visible.
答案
B
解析
对于如何观看日食,报道中提出的第一种办法就是用太阳镜过滤太阳的有害光线,但同时也指出太阳镜也有它的问题:They should be used when any part of the sun is visible, Sunglasses can block out some of the sun’s ultraviolet rays,but the results can be very deceptive.The eye’s natural reaction to this darken state when wearing sunglasses is to make the pupil lar-get,which allows in more light and can intensify the damage to your eyes.这三句恰好与D、A、C选项中的内容相符合,报道中并没有提到过B项,故正确答案应为B。
转载请注明原文地址:https://tihaiku.com/zcyy/3904336.html
相关试题推荐
[originaltext]Terrorismwasatopstoryinotherpartsoftheworld.InMarc
[originaltext]Thisweekinthemagazine,in"NerdCamp,"BurkhardBilgerwri
[originaltext]Thisweekinthemagazine,in"NerdCamp,"BurkhardBilgerwri
[originaltext]Thisweekinthemagazine,in"NerdCamp,"BurkhardBilgerwri
TheLouisianaterritoryofAmericawaspurchasedfrom______.A、SpainB、EnglandC、
ThewetvolcanicashthatcoveredaMayavillageinCentralAmericainabout
ThewetvolcanicashthatcoveredaMayavillageinCentralAmericainabout
[originaltext]Justawordofadvice:Ifyou’reafamouspersonlivinginLon
[originaltext]Justawordofadvice:Ifyou’reafamouspersonlivinginLon
[originaltext]Amassiveevacuationoftouristsinoneoftheworld’slargest
随机试题
Ican’tstay________long.A、toB、atC、forC本题考查介词。for后面加表示时间的词。Ican’tstayforl
You’dthinkPaulineHordwouldhaveservedhertimebynow.Afterall,shere
牡丹是洛阳的市花,洛阳每年4月都举办牡丹花会。“花中之王”牡丹在中国已有2400余年的人工栽培历史。唐宋年间,洛阳家家有牡丹。许多大诗人,如李白、杜甫
Ittookthreemonthsforthetwocompaniestoreachan(agree)______.agreement动词
[originaltext]M:Congratulations!Ijustheardaboutyouracceptanceintolaws
Thechangeinthatvillagewasmiraculou
设立合伙企业应当具备的条件之一是有( )以上合伙人。A.1个 B.2个 C
按股票持有者分类,股票可分为( )。A、流通股 B、社会公众股 C
关于渎职犯罪,下列哪些选项是正确的?()(2016年)A.县财政局副局长秦某工
出口食用动物饲料生产企业的登记备案本着自愿原则。( )
最新回复
(
0
)