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
6
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] 【B8】
选项
答案
essential
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3420853.html
相关试题推荐
[originaltext]Stressisaverynormalpartoflife.Mostpeoplefeelstress
[originaltext]Stressisaverynormalpartoflife.Mostpeoplefeelstress
Thethousandsofpeopleforcedtoabandontheirhomesinrecentweekstoflo
Thethousandsofpeopleforcedtoabandontheirhomesinrecentweekstoflo
Volumeshavebeenwrittenabouttechnology’sabilitytoconnectpeople.But
Volumeshavebeenwrittenabouttechnology’sabilitytoconnectpeople.But
[originaltext]M:Whatdoyouthinkaboutallthedifferentdietsthatpeoplego
[originaltext]M:Whatdoyouthinkaboutallthedifferentdietsthatpeoplego
[originaltext]Withgrowingnumbersofpeoplelivingalone,eitherbychoice
[originaltext]Withgrowingnumbersofpeoplelivingalone,eitherbychoice
随机试题
Inmuchoftherichworld65stillmarksthebeginningofoldage.Jobsend,
TheHappinessEffectThenexttimeyougettheflu,
Forthispart,youareallowed30minutestowriteashortessayoncollegestud
Theonlysurvivorofashipwreckwaswasheduponasmall,uninhabitedislan
[originaltext]Cattlehaveservedhumanitysinceprehistoricdaysasbeasts
下列不属于扩散燃烧的特点的是()。A.燃烧比较稳定 B.燃烧反应快,温
目前,预防控制危险化学品中毒、污染事故的主要措施有替代、变更工艺、隔离、通风、个
为妇科调经要药的是A.茜草 B.地榆 C.白及 D.三七 E.
下列关于西方古典多立克柱式的表述,错误的是()。(2019年真题)A.没有
根据《期货交易所管理办法》,下列关于期货交易所总经理的表述正确的是()。A.总经
最新回复
(
0
)