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
38
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.
【A4】
选项
答案
volcanoes
解析
文章第四段第二句提到,欧罗巴可能有液态水和火山。因此,填入volcanoes。
转载请注明原文地址:https://kaotiyun.com/show/xajK777K
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.becauseB.experienceC.pushedintoD.objectionsE.protestedF.complaintsG.oppose
A.tragedyB.actuallyC.preparedD.informE.visibleF.remindG.mealsH.
A.officialB.focusedC.commonlyD.economicalE.surgeriesF.discountG.fueling
A.unpaidB.obviousC.differedD.linkE.disproportionatelyF.whetherG.explanations
A.swallowB.allowC.omittedD.forcedE.urgentlyF.cookedG.refusesH.likely
(1)Nowthatit’ssummer,thegenerationgapintheofficeisasobviousasthealmost-barefeetflip-floppingdownthehallway.
(1)Ittookmeadecadetorealizethattheworldhasnoshortageoffashiondesignerswhoarecapableofmakingtrendy,elegant
Hello,everybody.Thankyouverymuchforinvitingmehere.It’sverypleasanttohaveachancetotalktoyouaboutsomethingt
Whenwethinkofgoodhealth,wealmostalwaysthinkabouteatinggoodfoodanddoingexercise.However,gettingenoughsleepan
SophieisfromLondon,whileMohammedisfromSierraLeone.Theyaretwoteenagerswithverydifferentlives,buttheirlivesar
随机试题
运用成本逼近法评估地价时,确定宗地开发程度的依据有()
大面积烧伤现场急救时,下列哪种情况最需要气管切开后方可安全转院()。
A.代脉B.促脉C.涩脉D.缓脉E.结脉脉来时有一止,止有定数,良久方来的脉象为
下列关于房地产市场特性的表述中,说房地产市场具有()是不正确的。[2004年考题]
游泳池和地上水池的水下灯只允许选用标称电压不超过12V的安全超低压供电。()
油断路器的安装程序中,断路器本体安装的紧后工序是()。
基金客户服务是基金营销的重要组成部分,目前通过7种方式来实现并优化客户服务,主要有()。
将旅游经济效益分为局部效益和整体效益的划分依据是()。
将“飞机——箱子”想象为“飞机穿过箱子”的记忆术是()。
PeopleintheUnitedStatesinthenineteenthcenturywerehauntedbytheprospectthatunprecedentedchangeinthenation’seco
最新回复
(
0
)