Nowadays many scientists depend on radiocarbon for dating age-old objects. When an organism dies, the C-14 in it begins to deca

admin2012-09-10 88

问题 Nowadays many scientists depend on radiocarbon for dating age-old objects.
When an organism dies, the C-14 in it begins to decay.

选项 A、Right
B、Wrong
C、Not mentioned

答案A

解析本题的内容在最后一段第三句话中可以找到：Once an organism(有机体)dies it stops taking in carbon in any form，and the C-14 already present begins to decay．一旦有机体死亡，它就停止吸收任何形式的碳，它所含的C-14就开始衰竭。

转载请注明原文地址:https://kaotiyun.com/show/emQd777K

本试题收录于：职称英语理工类C级题库职称英语分类

职称英语理工类C级

职称英语

相关试题推荐

NewChangesinAmericanLifeOnceitwaspossibletodefinemaleandfemaleroleseasilybythedivisionoflabor.Menworke
HowMenFacetheFatProblemItisapleasuretoseemenofacertainageworryingabouttheirweight.Listeningtothemis
AamedicalcareerBanattentivemindCnutritiousnutsDcarbonatedwaterEthegreatergoodFbodyandmindIt’sadvisable
A.RiskofScreeningtoYoungerWomenB.InvestigatingtheEffectofScreeningC.EffectsPredictedbyTwoDifferentMod
A.alonglifeexpectancyformostpeopleB.artistsareadroitindealingwiththeirpaintingsubjectC.engageinthemedica
Solvingaproblemcanbebrokendownintoseveralsteps.First,theproblemmustbeidentifiedcorrectly.Psychologistsreferto
Afterthecollision,heexaminedtheconsiderablewrecktohiscar.
TheMind-BodyConnectionsNormanCousinswasafamousAmericanmagazineeditor.In1964,hereturnedfromanoverseastripan
PreservingNatureforFutureDemandsforstrongerprotectionforwildlifeinBritainsometimeshidethefactthatsimilarne
Ihadsomedifficultyincarryingouttheplan.

随机试题

（）是自然界中唯一的营养最全面的食物，是婴儿最佳食物。
患者，男，40岁。因车祸致内脏破裂大出血，欲行急诊手术治疗。去手术室之前，护士遵医嘱为患者建立静脉通道并行输血治疗。因时间紧，护士从血库取血后将血袋放入热水中提温，5分钟后给患者输入。当输血10分钟后，患者感到头部胀痛，出现恶心、呕吐、腰背部剧痛。此反
对于有效期的表示方法A、Sep.10th2005B、2005-12-20C、31/21/2005D、2005.12.31E、2005-12美国产品大多采用（）
行政复议法规定()可以查阅被申请人提出的书面答复，作出具体行政行为的证据、依据和其它有关资料，除涉及国家秘密、商业秘密或者个人隐私外，行政复议机关不得拒绝。
2016年4月，某商场开业，其房产包括地面三层商场及地下一层(地下商场与地上商场相连)，地面商场原值3000万元，地下商场原值800万元。该商场还有一座独立的地下仓库(商业用途)，原价600万元。该商场所在省财政和地方税务部门确定的地下建筑物的房产原价折算
A、exerciseB、exceptC、taxiD、exactD根据语音知识可知，x在D项中的发音为／gz／，在其他三项中的发音均为／ks／。所以本题答案为D。
设f(χ)在[0，π]上连续，在(0，π)内可导，证明：至少存在一点ξ∈(0，π)，使得f′(ξ)＝－f(ξ)cotξ．
Inthesummerof1978,anEnglishfarmerdiscoveredinhisfieldthat______.Whichofthefollowingmayprovethatthecropci
CertainphrasesonecommonlyhearsamongAmericanscapturetheirdevotiontoindividualism:"Doyourownthing.""Ididitmywa
HowtoGetReadyforStudyingAbroadItwasailsomisleadinglysimple.IhadstudiedFrenchincollege,andmyuniversityo

最新回复(0)

Nowadays many scientists depend on radiocarbon for dating age-old objects. When an organism dies, the C-14 in it begins to deca

职称英语理工类C级

职称英语

NewChangesinAmericanLifeOnceitwaspossibletodefinemaleandfemaleroleseasilybythedivisionoflabor.Menworke

HowMenFacetheFatProblemItisapleasuretoseemenofacertainageworryingabouttheirweight.Listeningtothemis

AamedicalcareerBanattentivemindCnutritiousnutsDcarbonatedwaterEthegreatergoodFbodyandmindIt’sadvisable

A.RiskofScreeningtoYoungerWomenB.InvestigatingtheEffectofScreeningC.EffectsPredictedbyTwoDifferentMod

A.alonglifeexpectancyformostpeopleB.artistsareadroitindealingwiththeirpaintingsubjectC.engageinthemedica

Solvingaproblemcanbebrokendownintoseveralsteps.First,theproblemmustbeidentifiedcorrectly.Psychologistsreferto

Afterthecollision,heexaminedtheconsiderablewrecktohiscar.

TheMind-BodyConnectionsNormanCousinswasafamousAmericanmagazineeditor.In1964,hereturnedfromanoverseastripan

PreservingNatureforFutureDemandsforstrongerprotectionforwildlifeinBritainsometimeshidethefactthatsimilarne

Ihadsomedifficultyincarryingouttheplan.

（）是自然界中唯一的营养最全面的食物，是婴儿最佳食物。

对于有效期的表示方法A、Sep.10th2005B、2005-12-20C、31/21/2005D、2005.12.31E、2005-12美国产品大多采用（）

行政复议法规定()可以查阅被申请人提出的书面答复，作出具体行政行为的证据、依据和其它有关资料，除涉及国家秘密、商业秘密或者个人隐私外，行政复议机关不得拒绝。

A、exerciseB、exceptC、taxiD、exactD根据语音知识可知，x在D项中的发音为／gz／，在其他三项中的发音均为／ks／。所以本题答案为D。

设f(χ)在[0，π]上连续，在(0，π)内可导，证明：至少存在一点ξ∈(0，π)，使得f′(ξ)＝－f(ξ)cotξ．

Inthesummerof1978,anEnglishfarmerdiscoveredinhisfieldthat______.Whichofthefollowingmayprovethatthecropci

CertainphrasesonecommonlyhearsamongAmericanscapturetheirdevotiontoindividualism:"Doyourownthing.""Ididitmywa

HowtoGetReadyforStudyingAbroadItwasailsomisleadinglysimple.IhadstudiedFrenchincollege,andmyuniversityo