首页
登录
职称英语
The main reason we explore Mars is to determine if life ever existed on the
The main reason we explore Mars is to determine if life ever existed on the
游客
2023-09-01
34
管理
问题
The main reason we explore Mars is to determine if life ever existed on the planet. We have tried for centuries, starting with 【B1】______and lately with satellites, landers and rovers. We have 【B2】______ for it directly and indirectly. No luck so far. Some think life has never been there. Others think it was there in the past but is now gone. Many think why bother, but that’s a whole different story. I think we are 【B3】______in the wrong places. Here is why.
The surface of Mars is 【B4】______cold and dry. Cosmic and solar 【B5】______reach the surface by the thin atmosphere, and the soil contains strong oxidants (氧化剂) that destroy organic 【B6】______. Fat chance for life. But it wasn’t always so.
Early in its history Mars was warmer and 【B7】______enough for the development of rivers, lakes and perhaps oceans. The atmosphere was thicker and the protective magnetic (磁的) field was switched on. Mars might be 【B8】______today, but life would have been possible in the past. 【B9】______
But first we need to find a promising location, and that means reconstructing Martian history. 【B10】______, what type of minerals formed and if the geochemical conditions were compatible with life. Once promising sites are identified, we need to find out if there are 【B11】______ [br] 【B10】
选项
答案
We need to find out if there was flowing water.the time and extent of the water
解析
听写关键词 find out,flowing water,time,extent,the water
转载请注明原文地址:https://tihaiku.com/zcyy/2975612.html
相关试题推荐
[originaltext]It’sgreatfuntoexplorenewplaces—itfeelslikeanadven
[originaltext]It’sgreatfuntoexplorenewplaces—itfeelslikeanadven
[originaltext]It’sgreatfuntoexplorenewplaces—itfeelslikeanadven
Thedictionaryisoftenusedtodeterminethecorrectspellingofwords,or
Thedictionaryisoftenusedtodeterminethecorrectspellingofwords,or
Thedictionaryisoftenusedtodeterminethecorrectspellingofwords,or
Thedictionaryisoftenusedtodeterminethecorrectspellingofwords,or
Thedictionaryisoftenusedtodeterminethecorrectspellingofwords,or
Thedictionaryisoftenusedtodeterminethecorrectspellingofwords,or
Thedictionaryisoftenusedtodeterminethecorrectspellingofwords,or
随机试题
Theinterviewismainlyadiscussionconcerning______.[br][originaltext]Inter
Forthispart,youareallowed30minutestowriteaneye-witnessaccountofaf
HowtoApproachaDissertationI.Whatisadissertatio
ThenumberofUS【B1】______overtheageof65wholivealoneis【B2】______to
城市人行天桥的设置应方便残疾人通行,坡道的坡度不应大于以下哪项?()A.1:
抗原抗体反应中,抗体的合适浓度是A.固定的 B.规定的 C.与抗原相对而言
下列属于资产证券化参与者的有()。 ①发起人②承销商 ③受托人④投资
关于关节活动范围练习(ROM练习)的描述,正确的是()。A.尽早、频繁ROM练习
商业银行理财业务的特点有()。A.不占用银行资本 B.是一项金融知识技术密集
根据《中华人民共和国》,设立股份有限公司,应当由2人以上()以下为发起人。A.1
最新回复
(
0
)