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
A、It is three times bigger than Earth in size. B、It is 20 light years away from Earth. C、Its temperature is between 10 to 20℃. D
A、It is three times bigger than Earth in size. B、It is 20 light years away from Earth. C、Its temperature is between 10 to 20℃. D
admin
2012-10-21
44
问题
Astronomers have discovered a potentially habitable planet of similar size to Earth in orbit around a nearby star. A team of planet hunters spotted the alien world circling a red dwarf star called Gliese 581, 20 light years away. The planet is in the “Goldilocks zone” of space around a star where surface temperatures are neither too hot nor too cold for liquid water to form. If confirmed, the planet would be the most Earth-like that has ever been discovered in another solar system and the first strong contender for a habitable one. More than 400 exoplanets have been discovered by astronomers, but most are gas giants, like Jupiter, that would be inhospitable to life as we know it. Astronomers used the Keck telescope in Hawaii to study the movement of Gliese 581 in exquisite detail and from their observations inferred the presence of a number of orbiting planets. The team report two new planets in the Astrophysical Journal, bringing the total number known to be circling the star to six. One of the planets, named Gliese 581g, has a mass of three to four times that of Earth and takes 37 days to orbit the star. Astronomers believe it is a rocky planet with enough gravity to retain an atmosphere. Unlike the previously discovered planets, Gliese 581g lies squarely in the region of space where life can thrive. One side of the planet is always facing the star, much as one side of the moon constantly faces Earth. The average temperature on the planet is estimated to be between -31 to -12℃, but the ground temperature would vary from blazing hot on the bright side and freezing on the dark side.
Questions 32 to 35 are based on the passage you have just heard.
32. What can we learn about Gliese 581?
33. How many planets are circling Gliese 581 so far as we know?
34. What do astronomers think of the planet Gliese 581g?
35. In what aspect does Gliese 581g resemble the moon?
选项
A、It is three times bigger than Earth in size.
B、It is 20 light years away from Earth.
C、Its temperature is between 10 to 20℃.
D、There may exist some living things.
答案
B
解析
选项中的It,bigger than Earth,20 light years away等表明,It可能指代某一星球,本题考查该星球的相关情况。短文中提到,一个探索星球的团队发现了一个围绕红矮星运动的行星,起名为Gliese 581,距离地球20光年,故答案为[B]。
转载请注明原文地址:https://kaotiyun.com/show/Vtb7777K
0
大学英语六级
相关试题推荐
To________istosaveandprotect,toleavewhatweourselvesenjoyinsuchgoodconditionthlttothersmayalsosharetheenjo
Parentsoftenfacedthe________betweendoingwhattheyfeltwasgoodforthedevelopmentofthechildandwhattheycouldstan
Arapideconomicdevelopmentcallsforlong-timesocial________andunity.
In_________betweencommercialparties,theconstraintsareusuallynon-existentorvague.
Awallethasbeenfoundandcanbe______atthemanager’soffice.
HerfatherdecidedsheoughttohaveaprivateEnglish______.
A、MIT.B、ReedCollege.C、Harvard.D、Yale.A①选项都是学校名,应该一一记录听到的相关信息:A旁边记下first(或者数字1),D2,c4,然后仔细听问题。②排名第一和最后的往往是答案。
Internationalairlineshaverediscoveredthebusinesstravelers,themanorwomanwhoregularlyjetsfromcountrytocountryas
A、Amancarefulwithmoney.B、Abook-lover.C、Anoisyreader.D、Atrouble-maker.A选项表明,本题考查人物性格或爱好等。由对话中男士提到的BeforeIpaymymon
A、Inahotel.B、Inthepalace.C、InPuddingLane.D、InThamesStreet.C选项表明本题考查地点场所。短文中提到,ThefirestartedonSundaymorningin
随机试题
万能分度头的侧轴通过交错轴斜齿轮传动与分度盘相联系。()
关于胎头侧脑室的描述,不正确的是
根据《维也纳条约法公约》,以下关于条约保留的说法中正确的是哪些?()
关键部位或技术难度大、施工复杂的分项工程施工前,承包单位的技术交底书(作业指导书)要报( )审查。
关于合同的变更,下列说法正确的有()。
中国于()年正式加入《世界文化和自然遗产保护公约》。
长江中游城市群省会城市第四届会商会于2016年3月1日召开就2016年重点开展的合作事项形成《南昌行动》。()将共同打通长江中游城市群水、陆、空交通大通道。
调查显示,在经济较为依赖农业的中亚和南亚部分地区,水资源供应正面临严峻挑战。气候记录表明这些地区的干旱可能持续数年。气候变化可能会进一步加剧这些地区的水资源短缺。而一项研究显示,亚洲高山冰川夏季融水约36立方千米,足以满足2.21亿人的基本需求。有人据此得
HowmanydaysinoneweekdocsthemanhaveEnglishclasses?
Wemust______thattheexperimentiscontrolledasrigidlyaspossible.
最新回复
(
0
)