首页
登录
职称英语
[originaltext] It takes 8. 3 minutes for the sun’s light travelling at 186 2
[originaltext] It takes 8. 3 minutes for the sun’s light travelling at 186 2
游客
2024-03-07
47
管理
问题
It takes 8. 3 minutes for the sun’s light travelling at 186 282 miles a second to reach the earth. At that speed, light could travel around the earth seven times in one second. The sun looks yellow-gold, because we’re viewing it through the earth’s atmosphere. Judging from its surface temperature, the sun’s color is probably closer to white. The temperature of the sun at its core is around 73 million degrees F. It takes 50 years for this energy to reach the sun’s surface, where we can see it as light. The English astronomer James Jeans once figured that if you placed a piece of the sun’s core, the size of the head of a pin, on earth, its heat would kill a person 94 miles away. The temperature of the sun’s photosphere, the part that sends us light, is about 10000 degrees F. The sun contains 99. 9% of the matter in our solar system. The sun produces more energy in one second than human beings have produced in all of our history. In less than a week, the sun sends out more energy than we could make by burning all the natural gas, oil, coal and wood on the earth. The earth receives one two-billionth of the sun’s power. With every passing day, the sun is losing energy, but it still has about 5 billion years of life left.
Questions 9 to 11 are based on the passage you have just heard.
9. According to the speaker, what is the travelling speed of the sun’s light?
10. According to the speaker, what is probably the sun’s actual color?
11. What is happening each day to the sun?
选项
A、It is losing energy.
B、It is rotating once every 26.8 days.
C、It is moving further away from the earth.
D、It is travelling faster.
答案
A
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3512825.html
相关试题推荐
[originaltext]M:Today,weinviteMs.Lesleytotalkabouteducation.Howdoest
[originaltext]M:Isthereaneedtocontrolthepopulationonlyincountriesli
[originaltext]M:Isthereaneedtocontrolthepopulationonlyincountriesli
[originaltext]M:Isthereaneedtocontrolthepopulationonlyincountriesli
[originaltext]M:Isthereaneedtocontrolthepopulationonlyincountriesli
[originaltext]M:Isthereaneedtocontrolthepopulationonlyincountriesli
[originaltext]W:Hmm,hi.M:Hi,Iamgoingdoortodoortonighttotellpeople
[originaltext]W:Hmm,hi.M:Hi,Iamgoingdoortodoortonighttotellpeople
[originaltext]M:Howdoyouandyourhousemateslikethenewco-op?I’mthinkin
[originaltext]M:Howdoyouandyourhousemateslikethenewco-op?I’mthinkin
随机试题
Whichofthefollowingisastativeverb(静态动词)?A、Step.B、Push.C、Run.D、Underst
[originaltext]W:Ifoundanexpensive-lookingringinthelockerroomthismorn
[originaltext]Anapplication,orapp,developedbyresearchersattheUnive
设A,B是n阶方阵,A≠0且AB=0,则(). A.|B|=0或|A|=
扩展法是鉴别词和短语的一个重要标准,“黑板”可以扩展为“黑的板”、“北京大学”可
小明是刚转入市一小的五年级学生,他在原学校时成绩优秀,总是班里的第一名,但来到新
按公路的使用任务、功能和适应的交通量对公路分级,可分为()。A.高速公路,一
国家机关及其公职人员在贯彻和实施法律的活动时要严格依照法定职权和程序,保证法律的
接种卡介苗后的PPD试验有逐年减弱倾向,一般逐渐消失的时间是A.5~10年 B
根据《危险化学品安全管理条例》的规定,下列关于剧毒化学品运输管理的说法,正确的是
最新回复
(
0
)