首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Multidisciplinary science is all the rage these days. Even (31), the overlap between archaeology and pharmacology is not, at fir
Multidisciplinary science is all the rage these days. Even (31), the overlap between archaeology and pharmacology is not, at fir
admin
2009-06-24
25
问题
Multidisciplinary science is all the rage these days. Even (31), the overlap between archaeology and pharmacology is not, at first (32), obvious. But there is a connection. An analytical technique developed for the (33), used to work out how old things are, is now (34) used in the latter, to see if promising drugs are likely to fail (35) expensive clinical trials are undertaken.
At the (36), a third of drug candidates do not pass such trials. This may be (37) they fail to reach the part of the body where they are (38) to work—many molecules, for (39), cannot cross from the bloodstream into the brain. Or it may be that the body breaks down the active ingredients before the drug has time to act. Identifying (40) problems early in the testing process would be a boon. Trials on (41) can help, but how other species react is not always a good indication of how people will. What is needed is a way of testing potential drugs on people, (42) in a way that cannot possibly cause any harm. That is (43) the archaeologists come in.
(44) decades, archaeologists have used a technique called carbon dating to work (45) how old their finds are. Some of the carbon dioxide absorbed by plants during photosynthesis is (46). That is because it contains carbon atoms which are (47) than run-of-the-mill carbon, and are unstable. The radioactive carbon atoms weigh 14 atomic units, (48) nm-of-the-mill ones weigh 12 units. Food grains, scraps of cloth and so on can thus be dated by finding out how (49) radioactive carbon is left in them: the less there is, the (50) they are. (278 words)
选项
答案
before
解析
转载请注明原文地址:https://jikaoti.com/ti/XGxsFFFM
本试题收录于:
公共英语五级笔试题库公共英语(PETS)分类
0
公共英语五级笔试
公共英语(PETS)
相关试题推荐
ACountry’sStandardofLivingThe“standardofliving”ofanycountrymeanstheaverageperson’sshareofthegoodsandservic
ACountry’sStandardofLivingThe“standardofliving”ofanycountrymeanstheaverageperson’sshareofthegoodsandservic
FoodandHealthThefoodweeatseemstohaveprofoundeffectsonourhealth.Althoughsciencehasmadeenormousstepsinma
SaveEnergyatHomeOntheaverage,Americanswasteasmuchenergyastwo-thirdsoftheworld’spopulationconsumes.That’s(1)
SaveEnergyatHomeOntheaverage,Americanswasteasmuchenergyastwo-thirdsoftheworld’spopulationconsumes.That’s(1)
TheImportanceofAgricultureinChinaThedevelopmentofagricultureandthebalancebetweenfoodandpopulationareChina’
A.theabilitytoworkwithothersB.encouraginggroupmembersC.lackofgoodleadersD.bossingpeoplearoundE.workingout
Acculturationisaprocesswherebythemembersofonecultureadoptthecustomsofanother.
Thiscustomisstillprevailingamongmembersoftheoldergeneration.
Wheredidclassicalmusicoriginate?
随机试题
某汽车维修公司有部门、员工和顾客等实体,各实体对应的关系模式如下:部门(部门代码,部门名称,电话)员工(员工代码,姓名,部门代码)顾客(顾客号,姓名,年龄,性别)维修(顾客号,故障情况,维修日期,员工代码)假设每个部门允许有多部电话,则电话属性为
某公司面向城市居民推出了共享单车服务,居民通过智能手机就能快速租用和归还该公司提供的共享单车,用非常低廉的价格来完成一次几公里的市内骑行。居民在注册成为共享单车的用户时,需点击确认该公司提供协议与授权文件后方可注册使用,文件中的有一条为“发生事故概不负责”
下列关于监理大纲、监理规划、监理实施细则的表述中,错误的是( )。
安全检查分为日常性检查、专业性检查、季节性检查、节假日前后的检查和不定期检查,( )属于普遍性的检查。
甲期货公司因风险控制不力导致投资者保证金出现缺口,该期货公司应()。
经济体制的影响因素包括()。
杨某2017年11月取得如下收入:(1)出租住房,取得半年租金收入18000元(不含增值税),房屋租赁过程中缴纳的可以税前扣除的相关税费168元,修缮费2000元;(2)出版书稿,分3次取得收入,每次3000元;(3)转让境内上市公司A股股票(非限售
下列关于正式和非正式组织的表述正确的是()。
Manyayoungpersontellsmehewantstobeawriter.Ialwaysencouragesuchpeople,butIalsoexplainthatthere’sabigdiff
A.incidentB.whenC.includeD.flightsE.informedF.carriagesG.calledH.seriousI.stressfulJ.disasterK.comm
最新回复
(
0
)