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
49
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] 【B8】
选项
答案
uninhabitable
解析
句意推断题。根据句型可知此句是主系表结构,空格处要填入一个形容词作表语。根据下半句,过去的火星或许有生命迹象,由but可知上半句的句意应该与其相反,意为“现在的火星是不适宜居住的”。结合录音可知,答案为uninhabitable。
转载请注明原文地址:https://tihaiku.com/zcyy/2975610.html
相关试题推荐
[originaltext]Facialexpressionscarrymeaningthatisdeterminedbysituat
[originaltext]It’sgreatfuntoexplorenewplaces—itfeelslikeanadven
[originaltext]It’sgreatfuntoexplorenewplaces—itfeelslikeanadven
He______(不应该让我们等了那么长时间)fornoreasonatall,whichisquiteimpolite.shouldn’
Thedictionaryisoftenusedtodeterminethecorrectspellingofwords,or
Thedictionaryisoftenusedtodeterminethecorrectspellingofwords,or
Thedictionaryisoftenusedtodeterminethecorrectspellingofwords,or
Thedictionaryisoftenusedtodeterminethecorrectspellingofwords,or
Thedictionaryisoftenusedtodeterminethecorrectspellingofwords,or
Thedictionaryisoftenusedtodeterminethecorrectspellingofwords,or
随机试题
YouwillheararepresentativeofSGC,atelecomscompany,givingatalktoagr
[img]2012q1/ct_egreqm_egreqbj_0184_20121[/img][br]A、 B、 C、 D
Thepaintcompletelycameoffasaresultofconstant______torain.A、disclosure
[originaltext]W:Howwasyourholiday?Nottoomanyothertouristsaround,
Informationhasbeenputforward______moremiddleschoolgraduateswillbeadmit
监理人在审核投标报价时,发现某标书漏填了工程量清单中“坝基接触灌浆”一项的综合单
A.P,拉力 B.P,压力 C.O D.0.5P,压力
下列关于气雾剂表述错误的是A.气雾剂都应进行漏气检查 B.药物不溶于抛射剂或潜
据说某公司有如下做法,其中你认为真实的是()A.每次开会前,贴出告示,告诉与会
我国的《教师法》颁布于()。 A.1991年B.1992年 C.
最新回复
(
0
)