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
33
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] 【B9】
选项
答案
This is why future missions will focus on the studyof ancient deposits,hoping to find fossilisedevidence of life
解析
听写关键词future missions,focus on,ancientdeposits,hoping,find,fossilised evidence,life
转载请注明原文地址:https://tihaiku.com/zcyy/2975611.html
相关试题推荐
[originaltext]Facialexpressionscarrymeaningthatisdeterminedbysituat
[originaltext]Facialexpressionscarrymeaningthatisdeterminedbysituat
[originaltext]It’sgreatfuntoexplorenewplaces—itfeelslikeanadven
Thedictionaryisoftenusedtodeterminethecorrectspellingofwords,or
Thedictionaryisoftenusedtodeterminethecorrectspellingofwords,or
Thedictionaryisoftenusedtodeterminethecorrectspellingofwords,or
Thedictionaryisoftenusedtodeterminethecorrectspellingofwords,or
Thedictionaryisoftenusedtodeterminethecorrectspellingofwords,or
Thedictionaryisoftenusedtodeterminethecorrectspellingofwords,or
Thedictionaryisoftenusedtodeterminethecorrectspellingofwords,or
随机试题
Wecanlearnfromthepassagethatwhentwistingaround,______.[br][originalt
[originaltext]Igrewupinasmalltown.Myfatherraisedchickensandran
FederalReserveChairmanBenBernankewasnamedPersonoftheYearbyTimem
SportsSponsorshipⅠ.IntroductionAtpresenti
以下不属于债券按嵌入的条款分类的是( )。A.可赎回债券 B.通货膨胀联结债
尿胆原测定的最适宜标本为A.3h尿B.随机尿C.餐后尿D.首次晨尿E.12h尿
Thechangeinthatvillagewasmiraculou
正常情况下在耻骨联合上可扪及子宫底约产后A.7d B.10d C.12d
在完成待用间隔设备的交接试验后,应将预留间隔的断路器、隔离开关和接地开关置于分闸
(2017年真题)下列各项因素中,影响会计估计的估计不确定性程度的有()。
最新回复
(
0
)