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
31
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
because/that
解析
转载请注明原文地址:https://kaotiyun.com/show/bCTd777K
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
Thenormalpriceofaticketforanadultis$230.
SpaceResearchDoeswalkingonthemoonmakelifebetterforpeopleonearth?【51】alltheproblemsofourownworld,whyshou
SpaceResearchDoeswalkingonthemoonmakelifebetterforpeopleonearth?【51】alltheproblemsofourownworld,whyshou
ACountry’sStandardofLivingThe“standardofliving”ofanycountrymeanstheaverageperson’sshareofthegoodsandservic
FoodandHealthThefoodweeatseemstohaveprofoundeffectsonourhealth.Althoughsciencehasmadeenormousstepsinma
SaveEnergyatHomeOntheaverage,Americanswasteasmuchenergyastwo-thirdsoftheworld’spopulationconsumes.That’s(1)
SaveEnergyatHomeOntheaverage,Americanswasteasmuchenergyastwo-thirdsoftheworld’spopulationconsumes.That’s(1)
SaveEnergyatHomeOntheaverage,Americanswasteasmuchenergyastwo-thirdsoftheworld’spopulationconsumes.That’s(1)
Thiscustomisstillprevailingamongmembersoftheoldergeneration.
Wheredidclassicalmusicoriginate?
随机试题
鹅因________,宰杀时一定要抓紧,防止其挣扎。
牙本质敏感症对下列哪项刺激最敏感
关于碘对比剂的叙述,错误的是
添附作为财产所有权的取得方法,它是附合、混合、加工的总称。下列关于添附财产的归属的说法,不正确的是()。
根据所给资料,回答下列问题。2014年,该地区生态移民经营净收入占人均可支配收入的比重比农村居民低多少个百分点?()
有甲、乙两瓶质量相同的氯化钠溶液,甲溶液浓度为60%,乙溶液浓度为40%。现将甲溶液倒掉,乙溶液倒掉一半,然后混合在一起,此时得到的溶液浓度约为:
这几年来传统媒体一直唱衰,一些报纸、杂志多挣扎在生存线上,部分出版商虽然坚持在做纸版,但对于未卜的前途也时常感到困惑,独立书店的纷纷倒闭更是不忍多提。而对于读者来说,确实有许多人在过着放下书籍、拿起鼠标和手机的生活。由此,有些人认为,中国人均阅读量明显下降
“先综合,后对比”是编制()的基本思路。[江苏大学2012研]
下列有关类继承的叙述中,错误的是()。
Ifyouhappento______Peter,tellhimtocometomyoffice.
最新回复
(
0
)