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
46
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
Nine
解析
转载请注明原文地址:https://kaotiyun.com/show/smXd777K
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
WhyWouldTheyFalselyConfess?Whyonearthwouldaninnocentpersonfalselyconfesstocommittingacrime?Tomostpeople,
Alotofpeoplecouldfalliiiafterdrinkingcontaminatedwater.
A.EducationB.PeopleC.TransportD.DrinksE.FoodF.Nightlife*
ManofFewWordsEveryonechasessuccess,butnotallofuswanttobefamous.SouthAfricanwriterJohnMaxwellCoetzee
Examiner:Now,...(saythenamesofCandidateAandCandidateB)hereisalistofthepositiveandnegativeofChina’sentryint
Whatisthespeakermainlydiscussing?
Anniehadarrangedtogooutafterwork.
Anniehadarrangedtogooutafterwork.
Anniehadarrangedtogooutafterwork.
随机试题
蜀道之难,________!
枸橼酸铋钾为
某市人民法院审理市人民检察院依照审判监督程序提出抗诉的案件时,原审被告人王某收到抗诉书后下落不明。该法院应当作出什么处理?()
( )标准定义了环境审核及有关术语,并阐述了环境审核通用原则,宗旨是向组织、审核员和委托方提供如何进行环境审核的一般原则。
下列关于会计科目的表述中,正确的有()。
“贷放分控”的基本含义包括()。
市净率可以用来反映股票的投资价值。一般来说,市净率较高的股票,投资价值较高;反之,则投资价值较低。()
(2010年广东.材料二)根据下列资料和图形,回答下列问题。2008年各级财政共支出城市低保资金393.4亿元,比上年增长41.8%,保障了2330多万城镇贫困人口的基本生活。得到最低生活保障人员中:在职人员82.2万人,占总人数的3.5%,灵
对所有产品都进行了检查,并没有发现假冒伪劣产品。如果上述断定为假。则以下哪项为真?I.有的产品尚未经检查,但发现了假冒伪劣产品。Ⅱ.或者有的产品尚未经过检查,或者发现了假冒伪劣产品。Ⅲ.如果对所有产品都进行了检查,则
America’sDiplomaticChallengesVocabularyandExpressionscombatmissionTalibanseparatistDepartmentofDe
最新回复
(
0
)