In astronomy, a light-year is a unit of ___. A. time B. distance C. speed D. weight 相关知识点: 试题来源: 解析 B。在天文学中,光年是距离的单位,所以选 B。A 选项“time”是时间;C 选项“speed”是速度;D 选项“weight”是重量,均不符合光年的定义。反馈 收藏 ...
In the study of the universe, the term “light - year” is often used. A light - year is a unit of ___. Which option is correct? A. time B. length C. speed D. mass 相关知识点: 试题来源: 解析 B。解析:在天文学中,“光年”是一个长度单位,用于衡量天体之间的距离,而不是时...
( C )3. Light Year is related to A. energy B. speed C. distance D. intensity 相关知识点: 试题来源: 解析 答案见上【答案】该题考查名词词义辨析。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...
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...
A light year is the distance that light travels in one year. Which of the following is not a correct description of a light year? A. It is a measure of distance. B. It is about 9.46 trillion kilometers. C. It is equal to one astronomical unit. D. It is a very large distance. ...
百度试题 结果1 题目Light year is a unit to measure time.正确错误 相关知识点: 试题来源: 解析 错误 反馈 收藏
(D)A light year is how far light can travel in one year.Light always travels at the same speed:about 300,000 kilometresper 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 take 3,000 years t...
百度试题 结果1 题目11. “Light year" is a unit of BA. brightnessB. distanceC. timeD. speed 相关知识点: 试题来源: 解析 答案见上 反馈 收藏
This refers to the things that exist in this universe; we see around us things that exist, such as trees, rocks, mankind, the earth, the heavens, seas, rivers… If it is asked: these things are so many – who created them and is taking care of them? The answer is that if thes...
A light-year is a measurement of distance and not time (as the name might imply). A light-year is the distance a beam of light travels in a single Earth year, which equates to approximately 6 trillion miles (9.7 trillion kilometers). On the scale of the universe, measuring distances...