21.Foreverycoursethathefollowsastudentisgivenagrade，whichisrecorded，andtherecordisavailableforthestudenttoshowtoprospectiveemployers. 22.Allthisimpose

41.HisthesisworksrelativelywellwhenappliedtodiscriminationagainstBlacksintheUnitedStates，buthisdefinitionofracialprejudiceas"racially-basednegativepre

61.Ofcourse，itwouldbeasdangeroustooverreacttohistorybyconcludingthatthemajoritymustnowbewrongaboutexpansionasitwouldbetore-enacttheresponsethatgreeted

81.Bothnovelistsuseastorytellingmethodthatemphasizesironicdisjunctionsbetweendifferentperspectivesonthesameeventsaswellasironictensionsthatinhereinthe

101.Thusinadditiontothechancesofgoingawayfromtherightpathoutlinedabove，thescientificinvestigatorshareswiththeordinarycitizenthepossibilitiesoffallingi

121.Heenjoysthelibertieshardwonovercenturiesbytheallianceofphilosophicgeniusandpoliticalheroism，consecratedbythebloodofmartyrs（烈士）；heisprovidedwithc

141.Thoughmostdictionaryhaveasystemofmakingwordsasobsolete，orinuseonlyasslang，manypeople，moreespeciallyiftheiruseofaparticularwordhasbeenchallenged，ar

161.Withsocialistsdemandinganendto'wageslavery'anarchistssingingthepraisesofthevirtuesofdynamite，middle-of-the-roaderslikeSamuelGompersandMcGuire. 162

181.Theviewoveravalleyofatinyvillagewiththatched（草盖的）roofcottagesaroundachurch；adrivethroughanarrowvillagestreetlinedwiththatchedcottagespaintedpin

1.ableabilityenablecapablebeabletodo能够做… havetheabilitytodo能够做，有能力做…： Hehastheabilitytomakeverygoodboat. enable**todo使…能做…： Interneth