首页
登录
职称英语
[originaltext] Light travels at a speed that is about a million times faster
[originaltext] Light travels at a speed that is about a million times faster
游客
2024-05-15
68
管理
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、Light speed is millions of times faster than sound speed.
B、Light speed is a million times slower than sound speed.
C、Light speed is about millions of times faster than sound speed.
D、Light speed is about a million times faster than sound speed.
答案
D
解析
细节辨析题 本题的四个选项表达很接近,要注意区别millions of times,about millions of times和a million times。原文中提到的光速比声速快约一百万倍。
转载请注明原文地址:https://tihaiku.com/zcyy/3599374.html
相关试题推荐
[originaltext]Americansaresufferingfromaserioussleepdeficitwhileal
[originaltext]Americansaresufferingfromaserioussleepdeficitwhileal
[originaltext]W:Icometoremindyouofameetingscheduledfor10o’clockthi
[originaltext]W:Icometoremindyouofameetingscheduledfor10o’clockthi
[originaltext]Theworld’ssmartestadolescentsinmathematicsandsciencea
[originaltext]Theworld’ssmartestadolescentsinmathematicsandsciencea
[originaltext]InBritainthereare11nationaldailynewspapersmidmostpe
[originaltext]M:Weseemtobehavingthisconversationoverandoveragain.W:
[originaltext]M:Weseemtobehavingthisconversationoverandoveragain.W:
[originaltext]M:Hey,Amy,whereareyouoffto?W:TotheRecreationCenter.I
随机试题
Moresurprising,perhaps,thanthecurrentdifficultiesoftraditionalmarri
ThenovelofATaleofTwoCitiesisaboutastorythathappenedinthetimeof
TheTroodosareaofCyprusisonlyanhour’sdrivefromthecoast,sowhynot
Intheeighteenthcentury,writers______hoursincoffeehouses,discussingthe
坐落在京、津、唐、承四角交会地带的盘山,以“三盘暮雨”的独特景观被誉为“京东第一
宜采用姜炙法炮制的药材是A.淫羊藿B.厚朴C.黄柏D.麻黄E.丹参
在注射剂中,既有抑菌作用又有止痛作用的附加剂是A.苯酚 B.甲酚 C.苯
开放性损伤后预防破伤风的有效措施是A、清创并注射青霉素 B、清创并注射破伤风抗
下列税务咨询的形式中,适用于比较简单明了的涉税事项咨询服务的是()。A.书
患儿,9个月。右睾丸未下降阴囊内,查右阴囊空虚未触及睾丸,左侧发育正常。 该患
最新回复
(
0
)