首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
How may planets are there in the solar system revolving around the sun?
How may planets are there in the solar system revolving around the sun?
admin
2012-01-20
38
问题
How may planets are there in the solar system revolving around the sun?
Earth is one of nine planets which revolve (绕转) around the sun. This family of planets, with their moons, is known as the solar system. Since we live on Earth, we think it is the most important planet. But the other planets are also interesting. Some are smaller than Earth, some larger: some are hotter, some colder. Each one is different from all the others and has something special about it. No one knows for certain how the solar system began. We do know a lot about the planets, however, from the science of astronomy (天文学). Astronomers have done research on the planets and other objects in space for thousands of years. Astronomy is a very complicated science. We look at the other planets to study them, but the planet we are on is moving all the time. Computers have helped us in the past twenty or thirty years. The satellites we send into space to measure and take pictures also tell a lot about the planets and help us to understand them.
Mercury (水星) is the closest planet to the sun. It is also the smallest and fastest planet. The speed of the planet gave it its name: Mercury was the rapid messenger of the Roman gods. Mercury completes its orbit around the sun in only 88 days, while Earth’s orbit takes 3651/4 days. A day on Mercury, however, is much longer than a day on Earth, Earth rotates on it axis once every 24 hours. Mercury rotates on its axis once every 59 days.
Venus (金星) is the second planet in distance from the sun. It is about the same size as Earth, and it comes closer to Earth than any other planet. Next to the sun and the moon, Venus is the easiest object in the sky to see. People of ancient times loved its brightness and beauty so much that they named it after the Roman goddess of love and beauty.
Venus revolves around the sun once every 225 days and rotates on its axis once every 224 days. Information from telescopes and satellites shows to us that the planet is very hot. The temperature is usually between 300 and 675 degrees Celsius. We can observe both Venus and Mercury either in the evening or early in the morning just before the sun rises.
Mars (火星) is called the red planet because of its definite (明确的) red — orange color. It is the fourth farthest planet from the sun. A day on Mars is only about 40 minutes longer than a day on Earth, but a year lasts 687 days. The planet was named after the Roman god of war.
During many years, people believed that there was life on Mars, but we now know that there probably isn’t. The Mariner space program sent many satellites to Mars. We have excellent photos and information on this neighbor planet, and nothing suggests that there is any life there.
The fifth planet from the sun is also the largest of all the planets, Jupiter (木星). Jupiter revolves around the sun once every 12 years, yet its day is amazingly (惊人地) short. Its rotation, or its day, is only about 10 hours long. This is the fastest rotation — the shortest day — of any of the planets.
The planet’s name is appropriate, since Jupiter was the largest Roman god — the king of all the other gods. If you can imagine Jupiter as a hollow ball, all of the other planets would fit inside and there would still be a lot of room left. Jupiter has fourteen moons, the largest number of any planet.
选项
答案
Jupiter
解析
转载请注明原文地址:https://jikaoti.com/ti/UqKsFFFM
本试题收录于:
公共英语五级笔试题库公共英语(PETS)分类
0
公共英语五级笔试
公共英语(PETS)
相关试题推荐
ThroughoutBritain’shistory,therehasbeennoguaranteethataninvasionwouldnothappen.Churchillisconfidentthathewil
Thisspecieshasnearlydiedoutbecauseitshabitatisbeingdestroyed.
TheBeginningofAmericanLiteratureAmericanhasalwaysbeenalandofbeginnings.【C1】______Europeans"discovered"America
TheBeginningofAmericanLiteratureAmericanhasalwaysbeenalandofbeginnings.【C1】______Europeans"discovered"America
Examiner:Now,...(saythenamesofCandidateAandCandidateB)hereisalistofthepositiveandnegativeofpart-timejob.(
Whatdoesthespeakermainlydiscuss?
Migratorybirdsflyinformationto______.Howdotheresearcherstestpredictionsofwherebirdsshouldpositionthemselvesin
Whatshouldonedoifhewantstoworkmoreefficientlyathislowpointinthemorning?
ThespeakersaremakingarrangementsforMonday,TuesdayandWednesday.
AhearinghasbeenheldinHangzhourecently.Itfocusedonaproposalthattheluckynumbersofcarsshouldbeauctioned,andt
随机试题
等张收缩(isotoniccontraction)
以细胞渗出为主的炎症最先出现的病理过程是
寒淫证候的临床表现是
下列对维生素A醋酸酯述说不正确的是
患者,男,23岁,以四肢无力3d来诊。患者于1周前淋雨,3d前出现四肢对称性乏力,以下肢为重,不能行走,且日益严重,于当地医院行血钾检测为正常。考虑患者为何种疾病
拔牙造成上颌窦穿孔,孔径≤2mm时正确的处理方法是
致龋作用最强的碳水化合物是
患者,女,50岁。左下颌第二磨牙残冠,局部无炎症,拟行拔除。如拔牙时发生断根,位置较低,根挺应置于
下列观点中属于主观唯心主义的是()。
长篇叙事诗()是汉代诗歌中最杰出的作品,它描写的是建安时期庐江府小吏焦仲卿妻刘兰芝为焦母所迫还家,其兄逼嫁权贵,兰芝、仲卿殉情自杀的故事。
最新回复
(
0
)