Normallyastudentmustattendacertainnumberofcoursesinordertograduate,andeachcoursewhichheattendsgiveshimacreditwhichhemaycounttowardsadegree.InmanyAmericanuniversitiesthetotalworkforadegreeconsistsofthirty-sixcourses,eachlastingforonesemester.Atypicalcourseconsistsofthreeclassesperweekforfifteenweeks;whileattendingauniversityastudentwillprobablyattendfourorfivecoursesduringeachsemester.Normallyastudentwouldexpecttotakefouryearsattendingtwosemesterseachyear.Itispossibletospreadtheperiodofworkforthedegreeoveralongerperiod.Itisalsopossibleforastudenttomovebetweenoneuniversityandanotherduringhisdegreecourse,thoughthisisnotinfactdoneasaregularpractice.Foreverycoursethathefollowsastudentisgivenagrade,whichisrecorded,andtherecordisavailableforthestudenttoshowtofutureemployers.Allthisimposesaconstantpressureandstressofwork,butinspiteofthissomestudentsstillfindtimeforgreatactivityinstudentaffairs.Electionstopositionsinstudentorganizationsarousemuchenthusiasm.Theeffectiveworkofmaintainingdisciplineisusuallyperformedbystudentswhoadvisetheacademicauthorities.Anystudentwhoisthoughttohavebrokentherules,forexample,bycheatinghastoappearbeforeastudentcourt.Withtheenormousnumbersofstudents,theoperationofthesystemdoesinvolveacertainamountofactivity.Astudentwhohasheldoneofthesepositionsofauthorityismuchrespectedandwillbeofbenefittohimlaterinhiscareer.21．Normallyastudentwouldatleastattend________classeseachweek.A．36B．12C．20D．1522．AccordingtothefirstparagraphanAmericanstudentisallowedto________.A.liveinadifferentuniversityB.takeaparticularcourseinadifferentuniversityC.liveathomeanddrivetoschoolD.gettwodegreesfromtwodifferentuniversities23．Americanuniversitystudentsareusuallyunderpressureofworkbecause________.A.theiracademicperformancewillaffecttheirfuturecareersB.theyareheavilyinvolvedinstudentaffairsC.theyhavetoobeyuniversitydisciplineD.theywanttorunforpositionsofauthority24．Somestudentsareenthusiasticforpositioninstudentorganizationsprobablybecause________.A.theyhatetheconstantpressureandstrainoftheirstudyB.theywillthenbeabletostaylongerintheuniversityC.suchpositionshelpthemgetbetterjobsD.suchpositionsareusuallywellpaid25．Thestudentorganizationsseemtobeeffectivein________.A.dealingwiththeacademicaffairsoftheuniversityB.ensuringthatthestudentsobeyuniversityregulationsC.evaluatingstudents’performancebybringingthembeforeacourtD.keepingupthestudents’enthusiasmforsocialactivities要点综述】本文讲述美国大学生要毕业并拿到学位,必须学习一定数量的课程,并拿到该课程的学分.一般来说,要学习四年共36门课.但也可适当延长时间,还可到校外选课.学生成绩会被记录下来给招聘人员看,这些使学生处于长期的工作压力中,但仍有学生参加管理活动,而且进入学生社团会受到尊敬,并对将来的事业有利.21.B细节理解题.根据第一段可知：每门课每星期上三节,每学期要学四到五门课.因此每星期至少要上12节课.22．B细节理解题.文章第一段除介绍大学课程数及学制外,还提到可适当延长时间,还可到校外选课,因此B为正确答案.23．A推理判断题.学生处于工作压力中是因为学业成绩会被记录下来给招聘人员看.24．C推理判断题.文章最后一句话提到拥有这样的职位受人尊敬并对未来的事业有利,其他任何地方均未提到学生为何积极参与社团活动.25．B细节理解题.文中提到“Theeffectiveworkofmaintainingdisciplineisusuallyperformedbystudentswhoadvisetheacademicauthorities.”,此处关键是对maintainingdiscipline的理解,意为“维护纪律”,因此B为正确答案.