Nowadays many scientists depend on radiocarbon for dating age-old objects. Radiocarbon is reliable in dating an object back to

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问题 Nowadays many scientists depend on radiocarbon for dating age-old objects.
Radiocarbon is reliable in dating an object back to at least 50,000 years.

选项 A、Right
B、Wrong
C、Not mentioned

答案A

解析答案见文章倒数第二段最后一句：Most scientists agree that this ratio is useful for dating items back to at least 50,000 years．

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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

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Nowadays many scientists depend on radiocarbon for dating age-old objects. Radiocarbon is reliable in dating an object back to

职称英语理工类C级

职称英语

A.wherefewerpeoplediefromheartproblemB.whethertheyhavetheriskofheartattack,heartfailureorstrokeC.wouldpro

MostAdultsinU.S.HaveLowRiskofHeartDiseaseMorethan80percentofU.S.adultshavealessthan10-percentriskof

Theyshouldnotsacrificeenvironmentalprotectionstofostereconomicgrowth.

A.EffectsofastrokeB.AnnualcostofstrokeintheUSC.DefinitionanddescriptionofastrokeD.Breakthroughsintreat

Theconferenceexploredthepossibilityofclosertradelinks.

TooPoliteforWordsAJapanesecolleaguetheotherdaywastalkingaboutameetingwithamanwhomsheabruptlydescribedu

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WideWorldofRobotsEngineerswhobuildandprogramrobotshavefascinatingjobs.Theseresearcherstinker(修补)withmachines

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