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
专升本
A、It has a number of active volcanoes. B、It has an atmosphere like the earth’s. C、It has a large ocean under its surface. D、It h
A、It has a number of active volcanoes. B、It has an atmosphere like the earth’s. C、It has a large ocean under its surface. D、It h
admin
2017-05-31
46
问题
Since early times, people have been fascinated with the idea of life existing somewhere else besides earth. Until recently, scientists believed that life on other planet was just a hopeful dream. But now they are beginning to locate places where life could form. In 1997, they saw evidence of planets near other stars like the sun. But scientists now think that life could be even nearer in our own solar system. One place scientists are studying very closely is Europa, a moon of Jupiter. Space probes have provided evidence that Europa has a large ocean under its surface. The probes have also made the scientists think that under its surface Europa has a rocky core giving off volcanic heat. Water and heat from volcanic activity are two basic conditions needed for life to form. A third is certain basic chemicals such as carbon, oxygen and nitrogen. Scientists believe there might be such chemicals lying at the bottom of Europa’s ocean. They may have already created life, or maybe about to. You may wonder if light is also needed for life to form. Until recently, scientists thought that light was essential. But now, places have been found on earth that are in total blackness, such as caves several miles beneath the ocean. And bacteria, primitive forms of life have been seen there. So the lack of light in Europa’s subsurface ocean doesn’t automatically rule out life forming.
16. What did scientists once believe according to the passage?
17. What have scientists found about Europa, a moon of Jupiter?
18. What have scientists come to know recently about formation of life?
选项
A、It has a number of active volcanoes.
B、It has an atmosphere like the earth’s.
C、It has a large ocean under its surface.
D、It has deep caves several miles long.
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/GvXC777K
本试题收录于:
英语题库普高专升本分类
0
英语
普高专升本
相关试题推荐
OnedaywhenIwashavingaheartylunchatafast-foodrestaurant,anoldcoupleentered.They【C1】______amealatthecounter.
Ournewhouseisvery______formeasIcangettotheofficeinfiveminutes.
______,thedriverwentaheadtowardshischosendestination.
Ifyouwanttoknowthetrainschedule,please______atthebookingoffice.
AInmanywayschildrenlive,Basitwere,CinadifferentworldDwithadults.
Asyouhaveseen,thevalueofanation’scurrencyisa______ofitseconomy.
只要你不断努力,你迟早会解决这个问题的。
Foodisfuel.Youneeditforenergy.Whenyoudon’teat,youloseenergy.It’sthatsimple.【R1】______Unfortunately,itisalmost
同其他品牌相比,我们的电脑质量上乘,价格富有竞争力。
随机试题
甲、乙、丙、丁四人出资设立A有限合伙企业(以下简称“A企业”),其中甲、乙为普通合伙人,丙、丁为有限合伙人。合伙企业存续期间,发生以下事项:(1)5月,合伙人丙同A企业进行了120万元的交易,合伙人甲认为,由于合伙协议对此没有约定,因此,有限合伙人丙不得
Idon’tknowwhysheavoids________heropiniononthesubject.
电能表的总线应用铜芯绝缘线,其最小截面规定为________mm2。
团队沟通
用回弹法检验水泥混凝土的强度,需测出碳化深度,当用1%酚酞酒精溶液滴在孔的内壁,发现该混凝土已碳化,碳化后的颜色是()。
某旧建筑物,其建造成本为45万元,重置成本为48万元,墙、地面破旧折旧为8万元,户型不好导致功能折旧为9万元,区位变化引起的经济折旧为5万元,则该建筑物现值为()万元。
案例五:李先生打算为刚上小学的儿子筹备大一的开支。他准备采用教育储蓄的方式进行。为此,他向理财规划师咨询有关问题。根据案例五,回答下列问题:利用教育储蓄的最长期限,李先生应当在他儿子( )时开立教育储蓄账户。
预先披露的招股说明书(申报稿)不是发行人发行股票的正式文件,不能含有(),发行人不得据此发行股票。
下列事项中,属于会计估计变更的是()。
Whichofthefollowingdoesthefirstparagraphimply?Whatdoestheauthorconclude?
最新回复
(
0
)