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
2023-12-20
63
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、Its location for viewing in the world.
B、Its timing on the calendar.
C、Its movement across the sky.
D、Its beautiful scene.
答案
B
解析
对于这次日偏食之所以独特的原因,报道中说得很清楚: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。即这种发生在圣诞节的日食在过去的5000年中只有30次,可见它这种日期是非常稀罕的,故正确答案应为B。
转载请注明原文地址:http://tihaiku.com/zcyy/3289775.html
相关试题推荐
[originaltext]Today,wetellaboutapopulargraduatedegreeknownastheMB
[originaltext]Today,wetellaboutapopulargraduatedegreeknownastheMB
[originaltext]BankManager:Now,MissAndrews,howmuchdoyouactuallywantto
[originaltext]BankManager:Now,MissAndrews,howmuchdoyouactuallywantto
[originaltext]"Everybodylovesbargain"isawell-knownsaying.Abargainis
[originaltext]"Everybodylovesbargain"isawell-knownsaying.Abargainis
[originaltext]W:Couldyougivemesomethingforthepain?Ididn’tgettoslee
[originaltext]W:Couldyougivemesomethingforthepain?Ididn’tgettoslee
[originaltext]ThatteacherknewmorethananyoneI’veeverknown,butatthesa
[originaltext]ThatteacherknewmorethananyoneI’veeverknown,butatthesa
随机试题
[originaltext]Theremark"theonlygoodnewsstoryisabadnewsstory"is
Itisdifficulttoimaginewhatlifewouldbelikewithoutmemory.Themeani
[originaltext]M:Sowhydidyoudecidetoleave?W:Threeyearsisalongtime
下面哪些选项属于项目评价的内容?()A.目标评价 B.效益评价 C.跟踪评价
5岁半女孩,自半岁起青紫,逐渐加重,哭后明显,有昏厥、抽搐史。体检:胸骨左缘第3
A.维拉帕米 B.以上均可用 C.地尔硫革 D.普萘洛尔 E.硝酸甘油伴
主动脉瓣狭窄,可出现的是A.心尖部舒张期震颤 B.胸骨左缘第2肋问收
IrealizedtomyhorrorthatIhadforgo
某石油化工储罐区,柴油储罐采用水喷雾灭火系统进行冷却保护。下列关于水喷雾灭火系
下列构成房屋工程造价的计价方式中综合单价的是()。A.材料费 B.人工费
最新回复
(
0
)