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
Is there life anywhere in the universe other than on Earth? To answer that question, scientists look at outer space through tele
Is there life anywhere in the universe other than on Earth? To answer that question, scientists look at outer space through tele
admin
2020-12-02
58
问题
Is there life anywhere in the universe other than on Earth? To answer that question, scientists look at outer space through telescopes.They send up rockets and satellites and study the information that comes back.Scientists also study life forms on Earth.They think about the features on Earth that support life.Every answer helps them to know what to look for in outer space.
Researchers have learned that two things are required to keep life going on Earth.They are energy and flowing water.All life forms need water to survive.It takes energy to keep water in its liquid state, however.Earth’s energy comes from the sun.Our source for water is rain and snow, which are collected by oceans, lakes, rivers and streams.
What places in our solar system are likely to have energy to keep water in a liquid state? The answer to that question is unknown, but scientists have some ideas.They are looking very closely at the planet Mars.Although the atmosphere of Mars is very different from Earth’s atmosphere, it does have water.Martian air holds only about 1/1000 as much water as Earth’s air.Even that small amount can produce clouds, fog, and frost—all filled with water.The greatest problem with keeping water in a liquid state on Mars is the planet’s extreme cold.The average temperature on Mars is -81 degrees Fahrenheit.The warmest, it gets is 68 degrees Fahrenheit, and the coldest recorded temperature is -220 degrees Fahrenheit!
Life may also be possible on Europa, one of the moons of the planet Jupiter (木星).Scientists believe that Europa may have liquid water and volcanoes.The heat from volcanoes may keep oceans from freezing.Scientists are planning missions to Jupiter and Europa to bring back samples of surface ice.They suspect that if there is life on Europa, it may exist in an ice-covered ocean.They believe that deep below the ice, hot springs in the ocean floor heat the water.
Scientists also look at life on Earth to ponder questions about life in outer space.Life forms have adapted to some remarkably harsh conditions.Creatures too tiny to be seen with the human eye live in ice-covered Antarctic lakes and in steaming hot springs.Infrequently, small creatures can even be found in the dry centres of rocks.The existence of these life forms suggests that some very harsh places can support life.As scientists unlock the secrets of how living things survive on this planet, they come closer to answering questions about life forms elsewhere in our solar system and beyond.
Scientists use【A1】_________and space missions to study outer space to determine if there is life beyond Earth.After looking at life forms on Earth, scientists believe that living things need【A2】_________and energy.The planet 【A3】_________has water, while Jupiter’s moon Europa may have liquid water and【A4】_________.It’s amazing that life exists on Earth in places as frozen as Antarctica.Scientists continue to look closely at【A5】_________that support life on Earth for clues to where life may exist in other parts of the universe.
【A5】
选项
答案
extreme/harsh conditions/places
解析
文章最后一段倒数第二句提到,一些非常恶劣的地方可以维持生命。科学家们正在研究这些地方,旨在找到宇宙中可能存在生命的其他地方。因此,填入extreme/harsh conditions/places。
转载请注明原文地址:https://kaotiyun.com/show/DajK777K
本试题收录于:
D类竞赛(专科)题库大学生英语竞赛(NECCS)分类
0
D类竞赛(专科)
大学生英语竞赛(NECCS)
相关试题推荐
A.informedB.careerC.presentingD.relevantE.successfulF.effortG.reminded
A.aimB.argueC.reducingD.becauseE.reflectsF.strengthG.seekingH.available
A.probablyB.plantC.reasoningD.abilityE.stageF.speciesG.mammalH.di
A.butB.directC.fluentD.surveysE.subtleF.answeredG.dazzleH.abilities
PassageTwoWhatdopeoplemistakepassingatestofaskillfor?
Hello,everybody.Thankyouverymuchforinvitingmehere.It’sverypleasanttohaveachancetotalktoyouaboutsomethingt
A、Anewcompany.B、Anewproduct.C、Thejobmarket.D、Ajobinterview.D原文中,女士对男士说开始interview,由于这个单词具有两层含义:面试和采访,这里具体指哪一个需进一步确认。
Doyoulikecomics?Inthe1950sand1960s,manyteenagersusedtoreadcomicslikeBatman,SupermanorXMen.Someweresofasci
Doyoulikecomics?Inthe1950sand1960s,manyteenagersusedtoreadcomicslikeBatman,SupermanorXMen.Someweresofasci
随机试题
对早孕子宫做横切面扫查时,显示2个孕囊图像,这是由于
男性,35岁,以周期性麻痹入院,曾有肾结石病史。实验室检查:尿常规正常,血CO2CP15mmol/L,尿pH6.5,血钾3.0mmol/L,血氯109mmoL/L,阴离子间隙(AG)正常。
对软组织病变行CT增强扫描有助于()。
按《建设工程工程量清单计价规范》规定,工程量清单计价应采用()。
物业共用设施设备运行管理的原则包括()。
美国著名学者伊顿曾预言:“我们深信,在不久的将来,我们国家的最高经济利益,将主要取决于我们同胞的创造才智,而不取决于自然资源。”伊顿的预言在今天已经变为现实,金融危机、能源和矿产资源价格急剧上涨,世界经济滞涨风险苗头显现,国民的创新能力得到许多国家前所未有
实施科教兴国战略的根本途径是()。
Themanagerneedsanassistantwhohecan______totakecareofproblemsinhisabsence.
Amajorreasonforconflictintheanimalworldisterritory.Themaleanimal(21)anarea.Thesizeoftheareaissufficientt
组成一个计算机系统的两大部分是()。
最新回复
(
0
)