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
外语
A、1.3 seconds. B、Eight minutes. C、A life’s time. D、About four years. D事实细节题 原文中讲到距离地球最近的恒星离地球大约是四光年。
A、1.3 seconds. B、Eight minutes. C、A life’s time. D、About four years. D事实细节题 原文中讲到距离地球最近的恒星离地球大约是四光年。
admin
2012-11-30
63
问题
Light travels at a speed that is about a million times faster than the speed of sound. In one second, light travels about 300, 000 km, but sound travels only about 334 meters. You can get some idea of this difference by watching the start of a race. If you stand some distance away from the starter, you can see smoke come from his gun before the sound reaches your ears.
This great speed of light produces some strange facts. Sunlight takes about 8 minutes to reach us. If you look at the light of the moon tonight, remember that the light rays left the moon 1.3 seconds before they reached you. The nearest star is so far away that the light that you can see from it tonight started to travel towards you about four years ago at a speed of nearly 20 million km per minute. In some cases, the light from one of tonight’s stars started on its journey to you before you were born. Thus, if we want to be honest, we cannot say, "the stars are shining tonight.” We have to say, "the tars look pretty. They were shining four years ago, but their light has only just reached the earth."
选项
A、1.3 seconds.
B、Eight minutes.
C、A life’s time.
D、About four years.
答案
D
解析
事实细节题 原文中讲到距离地球最近的恒星离地球大约是四光年。
转载请注明原文地址:https://kaotiyun.com/show/YAb7777K
0
大学英语六级
相关试题推荐
Wegotthatapparent______thatpeoplepouredintotheovercrowdedurbanareawhilecomplainedofitsdensity.
Fillalltheholeswith______firstbeforeyoupaintthewall.
Dinnerwillbeready________butwehavetimeforadrinkbeforethen.
Marytried_______topersuadeherhusbandtogiveupsmoking.
Theexpertsreached______aboutthecausesofglobalwarmingintheinternationalconference.
Theinformationsuperhighwayhas_________solutionstopeople’sneedstocontactothersquicklyandconveniently.
Thisdiploma______thatyouhavecompletedhighschool.
Newtechnologylinkstheworldasneverbefore.Ourplanethas【26】It’snowa"globalvillage"wherecountriesareonlysecondsa
Newtechnologylinkstheworldasneverbefore.Ourplanethas【26】It’snowa"globalvillage"wherecountriesareonlysecondsa
MoneyorDream?1.现在的大学生有更多的自由决定将来的从业方向2.在做抉择时,有人考虑现实,有人坚持理想3.我的看法
随机试题
减少压弯件回弹的常用方法有哪些?
闭合性颅脑损伤不包括
某地块甲价格为2000元/m2,地块乙为2200元/m2,若甲允许的容积率为7,乙为5,其他条件两块地相同,则两块地总价相比有()。
会计报告是确认和计量的开始,即通过报告将确认、计量、记录的结果即本年度的会计信息进行归纳和整理,以方便编制下一年度的财务预算。()
以下属于风险管理框架八大要素的有()。
刘基刘基,字伯温,青田人。基幼颖异。元至顺间举进士,除高安丞,有廉直声。行省辟之,谢去。及太祖下金华,定括苍,闻基名,以币聘,基未应。总制孙炎再致书固邀之,基始出。既至,陈时务十八策,太祖大喜,筑礼贤馆以处基等,宠礼甚至。会陈友谅陷太平,谋东下,
若复数z满足z1=1+2i,则|z1-z|的最大值是()。
设非零n维列向量α,β正交且A=αβT.证明:A不可以相似对角化.
DVD盘中的信息存储在(9)中。
分布式数据中,外设储存的数据通常属于
最新回复
(
0
)