A light year is a measure of ___. A. time B. distance C. speed D. mass 相关知识点: 试题来源: 解析 B。本题考查光年的概念。光年是长度单位,是计量天体间距离的单位,所以答案是 B。选项 A“time”是时间;选项 C“speed”是速度;选项 D“mass”是质量。反馈...
解析 答案:一光年是长度的一种测量方法。核心短语/词汇: a light year:一光年 measure:测量方法 解析:根据“a light year:一光年”和“measure:测量方法”,结合语境可知答案。结果一 题目 【题目】A light year is a measure of length这句话什么意思啊? 答案 【解析】答案:一光年是长度的一种测量方法。核心...
NASA demonstrate in 1 minute 46 seconds just how far a light year is. Pretty far… You may also like: Listen&Learn: The History of Airplanes How Many ‘scales’ Can You See Here? Listen&Learn: The History of Santa Claus Posted by Josef Essberger April 2019 ...
The word "year," is normally a unit of time, but light-years measure distance. M. Aurelius/Shutterstock A light-year is a way of measuring astronomical distances in space. That doesn't make much sense because "light-year" contains the word "year," which is normally a unit of time. ...
A light year is the distance that light travels in one Earth year. 光前进的速度非常快 Light travels very fast, 大约每秒186000英里(或300000千米) about 186,000 miles or 300,000 kilometers every second. 光前进的速度快到...
1.【答案】A【解析】根据上文“Do you know what a light year is? It has nothing to do with time though"light year"has the word"year",which is normally a unit of time.(你知道光年是什么吗?虽然“光年”有“年”这个词,但它与时间无关,“年”通常是一个时间单位。)”和下文“We are used ...
Alph a Centauri is so far away.Questions 91 —95: Please complete the summary of the passage above with not more than three words for each blank.请完成上面篇章的内容摘要。 每空不超过三个单词。 A light year is the distance that light travels 91.. Light travels at 300,000 kilometres per...
A light-year is a measure of the distance it takes light to travel through interstellar space over the course of a year.When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. A Hubble Space Telescope image of the Andromeda galaxy, the Mil...
A light year is a basic unit astronomers use to measure the vast distances in space. To give you a great example of how far a light year actually is, it will takeVoyager 1(NASA’s longest-lived spacecraft) over17,000 yearsto reach 1 light year in distance traveling at a speed of 61...
A light-year is a measurement of distance and nottime(as the name might imply). A light-year is the distance a beam of light travels in a singleEarthyear, which equates to approximately 6 trillion miles (9.7 trillion kilometers).