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
2023-07-03
54
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] 【B6】
选项
答案
oxygen
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2804585.html
相关试题推荐
[originaltext]Stressisaverynormalpartoflife.Mostpeoplefeelstress
[originaltext]Stressisaverynormalpartoflife.Mostpeoplefeelstress
Thethousandsofpeopleforcedtoabandontheirhomesinrecentweekstoflo
Thethousandsofpeopleforcedtoabandontheirhomesinrecentweekstoflo
Thethousandsofpeopleforcedtoabandontheirhomesinrecentweekstoflo
Volumeshavebeenwrittenabouttechnology’sabilitytoconnectpeople.But
Volumeshavebeenwrittenabouttechnology’sabilitytoconnectpeople.But
[originaltext]M:Whatdoyouthinkaboutallthedifferentdietsthatpeoplego
[originaltext]Withgrowingnumbersofpeoplelivingalone,eitherbychoice
[originaltext]Withgrowingnumbersofpeoplelivingalone,eitherbychoice
随机试题
[originaltext]Whenmyinterestshiftedfromspacetothesea,1neverexpec
Youshouldspendabout20minutesonQuestions1-13,whicharebasedonReading
Whenyoufirstdriftoffintoslumber,youreyeswillrollaboutabit,your
27岁,初产妇,孕38周,食欲正常。昨晚9时起有腹部阵痛,一夜未睡,今晨就诊,精
2016年2月8日,协作单位李某等4人在1号坞口(围堰基坑-9.5m)
亡阴汗出的特点是A、冷汗味淡 B、汗多壮热 C、汗出肤温 D、汗出恶风
房地产经纪活动中的重要内容包括().A:了解客户动机 B:客源需求量的确定
下列不属于A型药物不良反应的是A.副作用 B.后遗效应 C.过敏反应 D.
计算较高服务等级航程的等级差额时,( )。 A.不考虑HIF,不考虑BHC
根据我国会计法律制度的规定,会计档案期满需要销毁,其程序包括()。A、由本单位档
最新回复
(
0
)