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
The main reason we explore Mars is to determine if life ever existed on the planet. We have tried for centuries, starting with 【
The main reason we explore Mars is to determine if life ever existed on the planet. We have tried for centuries, starting with 【
admin
2013-07-20
20
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】______
【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://kaotiyun.com/show/WOn7777K
0
大学英语六级
相关试题推荐
A、Hedidn’tbuyanythingwhileTommyboughtalot.B、Hegotsomemedicineforhishurtingfoot.C、Hetwistedhisfootandcouldn
Parentsareoftenupsetwhentheirchildrenpraisethehomesoftheirfriendsandregarditasaslur(诽谤,中伤)ontheirowncooki
Halloweenusedtobesomethingquitedifferentfromthecelebrationofsugarygreedthatgoesontoday.Earlierinthiscent
A、Nooneknows.B、TheChinesechefusedthewrongrecipes.C、Thehungryminersrequestedanewdishtobeserved.D、AChinesech
A、Theydidn’tcare.B、Theyhatedit.C、Theylovedit.D、Theyhavemixedfeelings.A短文谈到,一开始,大部分美国人认为白宫并没有什么特别之处,很少人见过白宫或者知道白宫是什么
A、Keeplookingforhiswalletmorecarefully.B、Reportthetheftofhiswalletassoonaspossible.C、Makeaphonecalltothes
A、Amancarefulwithmoney.B、Abook-lover.C、Anoisyreader.D、Atrouble-maker.A本题考查人物性格或爱好等。对话中提到的BeforeIpaymymoney...fi
HowBirdsFindWayHome?Theabilityofbirdstoreturntoafamiliarplacefromanydistanceisaremarkablefeatofnature
A、TheWaterfallGarden.B、Thetheatre.C、TheWaterWorld.D、TheOceanPark.D细节辨认题。问题询问哪个景点周末10点开放。听力开始女士说不知他们能否抽一天去海洋公园,男士在接下来的
A、Theyarenotasexpensiveasbefore.B、Theyarenotasnaturalaswebelieved.C、Theyarelesshealthythanweexpected.D、The
随机试题
程控交换机每一种接口又分为用户线侧和中继线侧两部分。()
小儿患小细胞贫血是由于缺乏
治疗要获得病人的知情同意。其道德价值应除外
清风小区是某市一高档住宅小区,张三、李四、王五、赵六都是该小区的业主,彼此都是邻居,住在一栋六层楼内。李四和王五住在六楼,张三和赵六住在五楼。张三住在李四家楼下,赵六住在王五楼下。请根据这些情况和下列各问中设定的条件回答问题:以下选项中,对张
使用国有土地,有下列哪种情形,报原批准用地的人民政府批准,收回用地单位的土地使用权,注销土地使用证?()
火灾风险评估常用的试验方法有()。
Hewrotemanychildren’sbooks,nearlyhalfof______werepublishedinthe1990s.
可持续发展的基本特征是()。
在考生文件夹下DULY\SEED文件夹中建立一个名为WOMAN的新文件夹。
AreFamiliesNecessary?Ashumanchildrenareunusually【1】foranunusuallylongtime,it’sobviousthateverysocietymustp
最新回复
(
0
)