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
58
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.
【C19】
选项
A、suspect
B、pledge
C、celebrate
D、conclude
答案
D
解析
根据空格前的Based on these findings,可知空格后的内容为基于发现所得出的结论。D项conclude“推断,认定”符合前后语义要求。基于上文所提的发现,不应当是“怀疑”(A项suspect)其他生命体的存在。我们也不需要“承诺”(B项pledge)有其他生命体。C项celebrate“庆祝”在上下文中找不到依据。
转载请注明原文地址:https://kaotiyun.com/show/lxMD777K
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
Weighingyourselfregularlyisawonderfulwaytostayawareofanysignificantweightfluctuations.【C1】________,whendonetoo
Weighingyourselfregularlyisawonderfulwaytostayawareofanysignificantweightfluctuations.【C1】________,whendonetoo
随机试题
"其华在发"的物质基础是
根据《合同法》的有关规定,对已成立的合同生效要件存在瑕疵,须经有权补正人追认方为生效的合同称为()
我国去年对房地产投资的宏观调控政策,使许多房地产投资者在实现其预期收益目标时遇到困难。这主要体现了房地产投资风险的()。
根据下列小题的具体要求,对应收账款进行相关设置和核算。收款结算。将客户为“优泉公司”、金额为35100元的收款单与相同金额的销售发票进行核销。
1628年出版了《心血运动论》一书,论证了血液在全身的循环运动,使生理学发展为科学的是()。
ThemessageDr.Farid’sworkfocusesoniscloseto______.Wecaninferfromthetextthat______.
CHICANERY:
AnotheraspectofAmericansocietythatmay【C1】______non-Americansisthefamily.The【C2】______familystructure(parentsandch
Afewyearsagoitwas【B1】______tospeakofagenerationgap,adivisionbetweenyoungpeopleandtheirelders.Parents【B2】____
A、Thebuyerhastherighttoreprintit.B、Thebuyerisallowedtochangeit.C、Theartistcontinuestoholdthecopyrightfori
最新回复
(
0
)