文档介绍：2009年职称英语等级考试试题及答案解析理工类（B级）第1部分：词汇选项（第1〜15题，每题1分，共15分）1个意义最为
下面每个句子中均有1个词或短语划有底横线，请为每处划线部分确定接近的选项。
Wouldyoupleasecallmhenucleus
InLibby'sradiocarbondatingtechnique,theweakradioactiveemissions（放射）fromthisdecayprocesserecountedbyinstrumentssuchasaradiationdetectorandcounterthedecayrateisusedtodeterminetheproportionofC-14atomsinthesamplebeingdated.
Carbon-14isproducedintheEarth'satmospherewhennitrog新）（-14,orN-14,interactswithcosmicrays（宇宙身寸线）.--.
AlllifeonEarthismadeoforganicmolecules（分子）that
-14atomstoothercarbonatomsintheirtissues（组织）.Onceanorganism（有机体）diesitstopstakingincarboninanyform,andtheC--14inthematerialdecreases,andtheratioofC-,thefewerC-14atomsinasampletheolderthatsampleisNowadaysmanyscientistsdepend013radiocarbonfordatingage-oldobjects
ARightBWrongCNotmentionedTheradiocarbondatingtechniqueisonlyabout40yearsold
ARightBWrongCNotmentionedAnatomofordinarycarbonhassixprotonsandeightneutrons
ARightBWrongCNotmentionedRadarisusedtodeterminethecharacteristicsofradiocarbon
ARightBWrongCNotmentionedTheC-14inanorganismbeginstodecaywhenitdies
ARight日WrongCNotmentionedThehalf-lifeofC-：概括大意与完成句子（第23〜30题，每题1分，共8分）Chimpanzees
Chimpanzees（黑猩猩）willsoonbeextinct（灭绝）.Ifthepresentrateofhuntingandhabitat（栖息地）destructioncontinues,thenwithin20years,therewillbenochimpanzeeslivinginthewildButthisismorethananenvironmentalormoraltragedy（悲居I）Chimpanzeeextinctionmayalsohaveprof