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
考研
Now that we are fairly sure that there are many Earth-like planets in the Galaxy, the time is ripe (or almost so) to wonder whet
Now that we are fairly sure that there are many Earth-like planets in the Galaxy, the time is ripe (or almost so) to wonder whet
admin
2023-02-14
84
问题
Now that we are fairly sure that there are many Earth-like planets in the Galaxy, the time is ripe (or almost so) to wonder whether these new worlds do indeed have a high probability of hosting new forms of life.
Currently, the best【C1】________on the existence of other planets comes from NASA’s【C2】________Kepler satellite, which has been mapping an area of the sky【C3】________some 150,000 stars.
Scientists estimate that around 5 percent of planets in our galaxy have masses similar【C4】________Earth’s and, possibly, are within the habitable zone of their stars, meaning that【C5】________they hold water it has a high chance of being liquid.【C6】________there are about 200 billion stars in our galaxy alone, scientists estimate that there should be about 10 billion Earth-size planets. Not bad, especially if we【C7】________that to be Earth-size and within a habitable zone is all it takes for life to take hold in an【C8】________world. In practice, however, the situation is much more【C9】________ since it depends on what life is and how it appears in a planet,【C10】________on the planet’s detailed geological history.
Here on Earth life appeared some 3.5 billion years ago.【C11】________that it may have been here as far【C12】________ as 3.8 billion years ago remain tentative. For about the first three billion years, life on earth was【C13】________in the form of single-cell creatures. Only when Earth’s atmosphere was full of oxygen did more sophisticated organisms appear.
【C14】________its unusual atmosphere, Earth’s heavy, single moon, its magnetic field also did something else that allowed complex life to【C15】________on its surface.【C16】________ these, Complex life would find it very hard to【C17】________ and survive.
The results from Kepler’s mission are encouraging and exciting. We have the【C18】________of confirming the existence of countless other worlds out there. Based on these findings, we should indeed【C19】________that other worlds would host some kind of simple life. However, as some scientists argued, Earth and its ability to host complex life will probably remain a【C20】________phenomenon in this and other galaxies.
【C4】
选项
A、as
B、to
C、with
D、like
答案
B
解析
所需介词应能搭配similar表示“与……相似”之意,说明“约有5%的行星具有跟地球相似的质量”。选项中只有B项to符合用法上的要求。A项as和D项like可表示“与……相像”之意,但通常不搭配similar使用。C项with通常也不与similar搭配。
转载请注明原文地址:https://kaotiyun.com/show/ERMD777K
0
考研英语二
相关试题推荐
ManyAmericanshavebeenfeedingababyaspirinonceaday,believingitwouldprotectthemfromaheartattack,astroke,ande
ManyAmericanshavebeenfeedingababyaspirinonceaday,believingitwouldprotectthemfromaheartattack,astroke,ande
ManyAmericanshavebeenfeedingababyaspirinonceaday,believingitwouldprotectthemfromaheartattack,astroke,ande
ManyAmericanshavebeenfeedingababyaspirinonceaday,believingitwouldprotectthemfromaheartattack,astroke,ande
ManyAmericanshavebeenfeedingababyaspirinonceaday,believingitwouldprotectthemfromaheartattack,astroke,ande
ManyAmericanshavebeenfeedingababyaspirinonceaday,believingitwouldprotectthemfromaheartattack,astroke,ande
Weighingyourselfregularlyisawonderfulwaytostayawareofanysignificantweightfluctuations.【C1】________,whendonetoo
Weighingyourselfregularlyisawonderfulwaytostayawareofanysignificantweightfluctuations.【C1】________,whendonetoo
随机试题
《灵枢.五色篇》把眉间部位称为()(1995年第15题)
目前临床上推广使用的交叉配血方法为
手术切断后会导致肛门失禁的组织是
A.酒中的乙醇B.茶叶中的鞣酸C.食醋中的醋酸D.食盐中的氯化钠E.烟中的烟碱能与胃蛋白酶、胰酶、淀粉酶中的蛋白结合,减弱其助消化药效的是
“宗教信仰”属于市场细分中的()细分变量?
各区、县人民政府,市政府各委、办、局,各市属机构:2012年6月,国务院印发了《关于加强食品安全工作的决定》(国发[2012]20号,以下简称《决定》),明确了加强食品安全工作的指导思想、总体要求、工作目标和具体措施。为进一步加强本市食品安全工作
党在过渡时期总路线的“两翼”是指()
若有以下程序voidflintx){if(x>=10)f(z);}{printf("%d-",x%10);f(x/10);}main(){int}z=123456;elseprintf("%d",x);}则程序的输出结果是
Howlongdoesittakefromheretothepestofficeonfoot?
AdvertisingisamultibilliondollarbusinessintheUnitedStates.Morethan33billiondollarsarespenteachyearforadverti
最新回复
(
0
)