首页
登录
职称英语
[originaltext] On December 25, 2000, many people across North America receive
[originaltext] On December 25, 2000, many people across North America receive
游客
2023-12-19
66
管理
问题
On December 25, 2000, many people 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 tile 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. u can also watch an eclipse by projecting 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:https://www.tihaiku.com/zcyy/3286207.html
相关试题推荐
[originaltext](1)AccordingtoarecentstudyinSweden,almosthalfofourunna
[originaltext](1)AccordingtoarecentstudyinSweden,almosthalfofourunna
[originaltext](1)AccordingtoarecentstudyinSweden,almosthalfofourunna
[originaltext](1)AccordingtoarecentstudyinSweden,almosthalfofourunna
[originaltext]M:We’realmostfinished.Couldyouhandmethewhitepepper?W:
[originaltext]M:We’realmostfinished.Couldyouhandmethewhitepepper?W:
[originaltext]M:We’realmostfinished.Couldyouhandmethewhitepepper?W:
[originaltext]Rodeosweren’talwaysthebigentertainmentshowsthatwesee
[originaltext]M:TellmeMrs.Evans,howdidyoucometobeabeardedlady?W:
[originaltext]Itiscommonknowledgethatmusiccanhaveapowerfuleffecto
随机试题
Oneofthemorediscernibletrendsinthefinancial-serviceindustryinre
Doyouagreeordisagreethatchangeisalwaysgood?Usespecificreasonsan
Lackofsleepmakesyougainweightandraisesyourriskforheartdiseasea
某大型项目的变更策略规定:把变更分为重大、紧急、一般和标准变更,并规定了不同级别
下述哪一项不属于医学心理学的研究对象()A.患者的焦虑 B.人的不良行
公开募集基金合同的内容包括( )。 Ⅰ.基金的运作方式 Ⅱ.
汗证肺卫不固的主症是( )。A.自汗为主,头部、肩背部明显 B.自汗为主,汗
在机动车驾驶员培训市场中,驾驶员考试实行()。A:企业定价 B:政府定价 C
利尿药主要作用于哪个环节发挥利尿作用A.影响肾内血流分布 B.增加集合管对水的
水利水电施工成本管理中,可以将投标报价高报的是()。A.投标竞争对手多的工程
最新回复
(
0
)