首页
登录
学历类
Light travels at a speed which is about
Light travels at a speed which is about
练习题库
2022-08-02
75
问题
Light travels at a speed which is about a million times faster than the speed of sound. In one second, light travels about 300,000 km. But sound travels only 344m. You can get some idea of his difference by watching the start of a race. If you stand some distance away from the starter, you can see smoke comes from his gun before the sound reaches your ears. This great speed of light gives us 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 left the moon 1.3 seconds before it reached you. The nearest star is so far away that the light which you can see from it tonight started to travel towards you four years ago at a speed of nearly 2 million km per minute. In some case, the light from one of tonight's stars started on its journey to you before you were born. Thus, if you want to be honest, you can say "The stars are shining to night?" You have to say“The stars look pretty. They were shining four years ago but their light has just reached Earth. "What is the meaning of the word "about" similar to?( )A. At most. B. At least. C. Only. D. Around.
选项
A. At most.
B. At least.
C. Only.
D. Around.
答案
D
解析
根据文章第一句话,光速大概是声速的1百万倍。故表示不确定的“大概,左右”,故选D。
转载请注明原文地址:https://tihaiku.com/xueli/2664614.html
本试题收录于:
高起本和高起专英语题库高起本高起专成考分类
高起本和高起专英语
高起本高起专成考
相关试题推荐
Lighttravelsataspeedwhichisabout
Lighttravelsataspeedwhichisabout
Lighttravelsataspeedwhichisabout
Lighttravelsataspeedwhichisabout
随机试题
Doctorssayangercanbeanextremelydamagingemotionunlessyoulearnh
Questions1-4Thetexthas6paragraphs(A-F).Whichparagraphcontainseachoft
[originaltext]M:Whatabeautifuldressyou’vegot!Iguessyoumusthavespent
Theyhavestudiedfor______years.[originaltext]ManyChinesestudentshave
2012年12月4日,中共中央政治局召开扩大会议,审议通过了关于改进工作作风、密
自由现金流量(FCFF)的公式为()。A.自由现金流量(FCFF)=(税
2016年各类市场主体中企业占比约为:A.24% B.26% C.27%
对有效市场理论的一大挑战来自一些无法解释的市场异常现象,即表明市场无效。异常现象
A.清晨服用 B.餐后服用 C.餐前服用 D.睡前服用 E.餐中服用为了
(2019年真题)某企业赊销商品时知晓客户财务困难,不能确定能否收回货款,为了维
最新回复
(
0
)