首页
登录
职称英语
Since early times, people have been fascinated with the idea of life existin
Since early times, people have been fascinated with the idea of life existin
游客
2024-02-04
20
管理
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 planets was just a【B1】______ dream. But now they are beginning to【B2】______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【B3】______ system. One place scientists are studying very closely is Eu- ropa, a moon of Jupiter. Space probes have【B4】______ evidence that Europa has a large ocean under its surface. The probes have also made scientists think that under its surface Europa has a rocky core【B5】______ 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,【B6】______ and nitrogen. Scientists believe there might be such chemicals lying at the bottom of Eu- ropa’s ocean. They may have already created life, or may【B7】______. You may wonder if light is also needed for life to form. Until recently, scientists thought that light was【B8】______. But now, places have been found on earth that are in total blackness, such as caves several miles beneath the surface, and bacteria,【B9】______forms of life, have been seen there. So the lack of light in Europa’s subsurface ocean doesn’t automatically【B10】______ life forming. [br] 【B4】
选项
答案
provided
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3420849.html
相关试题推荐
[originaltext]Stressisaverynormalpartoflife.Mostpeoplefeelstress
Thethousandsofpeopleforcedtoabandontheirhomesinrecentweekstoflo
Thethousandsofpeopleforcedtoabandontheirhomesinrecentweekstoflo
Thethousandsofpeopleforcedtoabandontheirhomesinrecentweekstoflo
Volumeshavebeenwrittenabouttechnology’sabilitytoconnectpeople.But
Volumeshavebeenwrittenabouttechnology’sabilitytoconnectpeople.But
Volumeshavebeenwrittenabouttechnology’sabilitytoconnectpeople.But
[originaltext]Withgrowingnumbersofpeoplelivingalone,eitherbychoice
[originaltext]Whenastormiscoming,mostpeopleleavetheareaasquicklyas
[originaltext]Whenastormiscoming,mostpeopleleavetheareaasquicklyas
随机试题
A—ROM(ReadOnlyMemory)B—CAD(ComputerAidedDesign)C—
[originaltext]M:Idon’tunderstandit.IgotanoticefromthebankthatIhad
As______clearfromhismanners,heisateacher.A、beingB、isC、tobeD、beenBas意
电话通信系统的主要组成部分包括()。A.用户终端设备 B.传输系统 C.
甲、乙、丙经营普通合伙企业,约定由甲代表合伙企业执行合伙企业事务,后来乙擅自代表
成人男性贫血的诊断标准为A、血红蛋白<120g/L;血细胞比容<0.40;红细胞
大黄中泻下成分是A.菲醌类 B.木脂素 C.二蒽酮类 D.游离蒽醌类 E
知觉的整体性是指在直接作用于感觉器官的外界刺激不完备的情况下,人们根据自己的经验
某企业为推介本公司产品,向希望工程捐献了100台本公司生产的电脑,这属于()动
男,20岁。Ⅰ型糖尿病病史10年,平时每天4次胰岛素强化治疗。近2天发热、咽痛,
最新回复
(
0
)