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 ...
The light-year, alternatively spelled lightyear, is a unit of length used to express astronomical distances and is equivalent to about 9.46 trillion kilometers or 5.88 trillion miles. As defined by the International Astronomical Union, a light-year is the distance that light travels in vacuum in ...
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...
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. ...
What Is a Light-Year?Math Dude Jason Marshall
What is a light year? 一光年是指光在真空中传播一年经过的距离 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,...
Light year is related to___.A:energyB:speedC:distanceD:intensity 相关知识点: 试题来源: 解析 C 该题考查名词词义辨析。句意:光年与距离有关。energy 能量,speed 速度,distance 距离,intensity 强度;根据常识,光年是指的是光在真空中,沿着直线,经过一年的时间所传播的距离,结合句子信息推知句意:光年与距离...
A light year is how far light can travel in one year. Light always travels at the same speed: about 300,000 kilometres per second. This is the fastest speed possible in the universe. Nothing travels faster.Imagine a star is 3,000 light years away. This means it would take3,000 years...
She got up from her bed and stumbled her way to the window, through which some green spots of light could be seen floating in the forest. “Tiny fairies, Mike!” she said, pressing her forehead against the window, “...
Light Year A 'light year' is a unit of measurement that is equal to the distance that light can travel in one year. One light year is equal to about 5,878,625,400,000 miles. Answer and Explanation: Learn more about this topic: ...