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 many planets are there in the solar system revolving around the sun?
How many planets are there in the solar system revolving around the sun?
admin
2018-03-16
24
问题
How many 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 sent into space to measure and take pictures also tell a lot a-bout 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 365 — days. A day on Mercury, however, is much longer than a day on Earth. Earth rotates on its 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 planets. 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 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.
For 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 planets.
选项
答案
88 days
解析
转载请注明原文地址:https://kaotiyun.com/show/VRWd777K
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
Detailsoftheprivatelifeofanastronautarehardtocomeby,becausetheyare______.Thephrase"talkingshop"(line4,par
Pollutionisa"dirty"word.Topollutemeanstocontaminate—topsoilsomethingbyintroducingimpuritieswhichmake(31)unfito
Pollutionisa"dirty"word.Topollutemeanstocontaminate—topsoilsomethingbyintroducingimpuritieswhichmake(31)unfito
ThenewprestigeoftheBritishgraduatesisthemostspectacularbecauseinthepastBritainhasbeenmuch(31)interestedinu
ThenewprestigeoftheBritishgraduatesisthemostspectacularbecauseinthepastBritainhasbeenmuch(31)interestedinu
Whatisthispassagemainlyabout?
Mostpeopleareright-handedandchildrenusuallyhavethesamehandednessastheirparents.Thissuggeststhatgenesareatwor
Howmanyplanetsarethereinthesolarsystemrevolvingaroundthesun?
Whatdoesthespeakersuggestthatthestudentsshoulddoduringtheterm?
Thesurveyresultssuggestthatthelargestincreaseinsubstanceuseshouldbe______.Thepeoplewhotookpartinthesurvey
随机试题
癫痫大发作时最具有特征的表现是
识别超声伪像可以
我国已将()种职业致癌物所致的癌症,列人职业病目录。
短跑途中跑的技术关键是后蹬的力量和速度。()
地方课程属于()。
1岁8个月的东东想给爸爸吃苹果,会对爸爸说“爸爸,果果,吃”,并把苹果递给爸爸。这表明这个阶段的儿童语言发展的一个主要特点是()
预计到2045年,中国老年人口将达到4亿左右,解决人口老龄化问题,需要政府、社会和家庭共同努力。在中国传统社会中,赡养老人在很大程度上属于子女义务,而不是政府责任。这种养老观念不仅会增加年轻人的负担,也有悖于以人为本的价值取向。将养老问题纳入社会统筹和政府
教育优先发展的理论基础是()
计算
已知向量组等秩,则x=_______
最新回复
(
0
)