首页
登录
职称英语
One way to determine which planets outside the solar system might harbor lif
One way to determine which planets outside the solar system might harbor lif
游客
2024-01-10
14
管理
问题
One way to determine which planets outside the solar system might harbor life is to look for telltale signs in their light. Living organisms create a chemical disequilibrium in their environment, typically indicated by a molecule whose presence can be explained only if some presence is continually regenerating it. For example,
Earth’s atmosphere contains oxygen
because photosynthesis produces it faster than it is lost through processes such as the rusting of iron in rocks. However, chemical disequilibrium does not necessarily indicate the presence of life because, as in the case of methane on Mars, the imbalance could arise through nonbiological processes. [br] According to the passage, which of the following about the presence of a chemical disequilibrium is true?
选项
A、It may indicate the presence of life.
B、It may be the product of a nonbiological process.
C、It is something that typically is short-lived.
答案
A,B
解析
A项对应文章前三句。B项对应第四句。C项文中未提及。
转载请注明原文地址:https://tihaiku.com/zcyy/3349324.html
相关试题推荐
GiventhepersistentandintransigentnatureoftheAmericanracesystem,
GiventhepersistentandintransigentnatureoftheAmericanracesystem,
Whilethediseaseisinstateitisalmostimpossibletodetermineitsexistence
Anessentialpurposeofthecriminaljusticesystemistoenablepurgationtota
Longconsideredoneofthemostbeautifuloftheplanets,Saturnhasringsthat
Althoughplantandanimalspeciesthatbecomeestablishedinecosystemswhereth
Ifresearcherscandetermineexactlywhatiswrongwithpeoplewhosufferfromt
Someecosystemsaremore(i)______thanothers,betterabletowithstandchanges,
Farfrom_________innovations,asthepatentsystemwasdesignedtodo,thepat
Ifgiantx-rayflareschurncircumstellardisksenoughtokeepnewbornplanets,
随机试题
[originaltext]M:Whydoyouthinkthatway?W:WhileIadmitthereisverylitt
Asamediumofexchangemoneypermitstheseparationofexchangeintothetw
竞争激烈fiercecompetition
Overthelasttwoyears,inthePCbusinessMichaelDellhasbeenbeatenlike
表 2010年房地产开发和销售主要指标完成情况 2010年全国非商品住宅投
梁的横截面是由狭长矩形构成的工字形截面,如图所示。z轴为中性轴,截面上的剪力竖直
坝体反滤层必须符合下列要求()。A.使被保护的土不发生渗透变形 B.渗透性
熄灯巡视指夜间熄灯开展的巡视,重点检查设备()。放电$;$有无电
率先正式使用“班级”一词的著名教育家是()。 A.埃拉斯莫斯 B.夸美纽斯
发于舌背部的舌癌,早期常转移至A.额下或颈深中群淋巴结 B.颈淋巴结 C.下
最新回复
(
0
)