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
2019-10-21
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
Computers and satellites
解析
转载请注明原文地址:https://jikaoti.com/ti/kuIsFFFM
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
Aneconomistissomeonewhoknowsalotabouthowgoodsandwealthareproducedandused.Food,for(31),isakindofgoods.Ev
Aneconomistissomeonewhoknowsalotabouthowgoodsandwealthareproducedandused.Food,for(31),isakindofgoods.Ev
Americanscientistsinvarietyofdisciplinescontinuetostruggletostart______.
Americanscientistsinvarietyofdisciplinescontinuetostruggletostart______.
Thecultureindustrydidawaywithyesterday’srubbishbyitsownperfection,andbyforbiddinganddomesticatingtheamateurish
Accordingtothepassage,ithasbeensuggestedthatthescienceofhumanrelationswasslowtodevelopbecause______.Itcanb
I’dliketotalktoyoutodayaboutanarticlethatappearedintheHonoluluAdvertiser.Thearticlewasconcerned(31)somethin
AndrenaGravidaisthenameofawildbeedecliningintheUnitedKingdomandtheNetherlands.A(31)ofmonthsagotherecentd
______isnarrowinthenorthandwideinthesouth?______isdrainedbyoneoftheworld’sgreatestriversystems?
Besidesthefunctionsasavitalentertainmentmedium,whatelsecanpeopleuseaTVas?
随机试题
需要常规对性伴侣进行治疗的女性生殖系统炎症是
合理设置组织机构的作用有哪些?
高层建筑采用钢筋混凝土筒中筒结构时。外筒柱子截面设计成下列哪种截面为最好?
常用作各种机器中的齿轮、轴承等受载磨损零件的复合材料是()。
某大型水利水电工程由政府投资兴建。项目法人委托某招标代理公司代理施工招标。招标代理公司依据有关规定确定该项目采用公开招标方式招标,招标公告在当地政府规定的招标信息网上发布。招标文件中规定:投标担保可采用投标保证金或投标保函方式担保。评标方法采用经评审的最低
某市商业银行2013年第四季度发生以下经济业务:(1)取得一般贷款业务利息收入600万元;支付单位、个人存款利息100万元。(2)取得向其他银行贷款利息收入450万元,出纳长款收入1万元,结算手续费收入12万元,结算罚款收入4万元。(3)取得转让公司
Thehumanbeinglongsforasenseofbeingaccomplished,ofbeingabletodothings,withhishand,withhismind,withhiswill
改革开放以来,我国社会结构出现了重大变化,出现了新的社会阶层,主要有()
PresidentJohnKennedywas______inDallasin1963.
Someindividualsandcitizens’groupshaveexpressedconcernaboutthelevelofviolenceintelevisionprograms,particularlyin
最新回复
(
0
)