6Whethertousetests,otherkindsofinformation,orbothinaparticularsituationdepends,therefore,upontheevidencefromexperienceconcerningcomparativevalidityanduponsuchfactorsascostandavailability.95
7“Inshort,”aleaderofthenewschoolcontends,“thescientificrevolution,aswecallit,waslargelytheimprovementandinventionanduseofaseriesofinstrumentsthatexpandedthereachofscienceininnumerabledirections.”
二）定语从句
1.试译：夜莺用生命换来的玫瑰花被拒绝了。
艾滋病的治疗是我们可以合作的领域
Theoldladydied_______________(在她儿子到达的那天).
Thisis_______________(我赞成这一改革的理由).
Weshouldrespectthose_____(毕生致力于服务人民的人)
2.Socialscienceisthatbranchofintellectualenquirywhichseekstostudyhumansandtheirendeavorsinthesamereasoned,orderly,systematic,anddispassionedmannerthatnaturalscientistsuseforthestudyofnaturalphenomena.2003定语从句的重点和难点：
Arichpersonisnotwhohasthemost,butisonewhoneedstheleast
Whensomeoneabandonsyou,heistheonewhoshouldgetloss
1.Theresearchersmadegreatprogressintheearly1970s,whentheydiscoveredthatoncogenes（致癌基因）,whicharecancer-causinggenes,areinactiveinnormalcells.94
2.Bycontrast,theysawintheprecedinghundredyearsfrom1650to1750,whenEnglandwasstillacompletelyagriculturalcountry,aperiodofgreatabundanceandprosperity.（98年完型）
3.Untilsuchtimeasmankindhasthesensetoloweritspopulationtothepointwheretheplanetcanprovideacomfortablesupportforall,peoplewillhavetoacceptmore“unnaturalfood”.91翻译
4helikesliftingweight,whichisagoodexercise.
5.Manyoflife’sproblemswhichweresolvedbyaskingfamilymembers,friendsorcolleaguesarebeyondthecapabilityoftheextendedfamilytoresolve95
6.Forworkersitcanmeananendtothesecurity,benefitsandsenseofimportancethatcamefrombeingaloyalemployee.97