今天小编带来了关于英语四六级知识点分享，希望对大家的学习有所帮助，预祝大家考试顺利。

1.

A.White.

B.Black.

C.Hispanic.

D.AmericanIndian.

2.

A.Signsofincreasedanger.

B.Aclearinterestinweaponsandviolence.

C.Depressionorisolation

D.Signsofexcitedness.

听力文本

AnewstudysuggeststhatmanyofthedeadlyschoolshootingsintheUnitedStatesoverthepast10yearscouldhavebeenprevented.Moststudentswhocarriedoutsuchanattackhadshownthreateningorsuspiciousbehavior,butwerenotreportedtolawenforcement,thestudyfound.Thestudywasbasedonanin-depthexaminationof41incidentsof"targetedschoolviolence."Alloftheattackshappenedovera10-yearperiodfrom2008to2017.Thestudyfoundthattheshootingstookplacequicklyandoftenendedwithin60secondsorless.Lawenforcementrarelyarrivedwhiletheattackwashappening.Attacksgenerallystartedduringschoolhoursandhappenedinasinglearea,suchasadininghall,restroomorclassroom.Mostoftheattackersweremale,butsevenwerefemale.Researchersreportedthat63percentoftheattackerswerewhite.Fifteenpercentwereblack,5percentHispanicand2percentAmericanIndianorAlaskaNative.Theattackersmostoftenusedguns,butknivesweresometimesused.Investigatorssaidmostoftheweaponscamefromthehomesoftheattacker.Thereportidentifiedwarningsignsthatschoolofficials,familiesandotherstudentscouldusetohelpthemrecognizeapossibleattacker.Theseincludesignsofincreasedanger,aclearinterestinweaponsandviolence,depressionorisolation,self-harmorsuddenbehavioralchanges.ThestudyfoundmostU.S.schoolshavesecuritycamerasaswellasplannedlockdownmeasuresforshootingsituations.However,only17percentoftheschoolshadasysteminplacewherestudentsorfamiliescandirectlycontactofficialsaboutastudentincrisis.

Question1:Accordingtothenewsreport,whichofthefollowinggroupcommittedmostoftheschoolshootings?

Question2:Accordingtothenewsreport,whichofthefollowingisnotmentionedtobehelpfulforschoolofficials,familiesandotherstudentstorecognizeapossibleattacker?

重点词汇

1.suspicious:makingyoufeelthatsomethingillegalishappeningorthatsomethingiswrong可疑的，引起怀疑的

2.lawenforcement:theactivityofmakingcertainthatthelawsofanareaareobeyed执法

3.Hispanic:connectedwithSpainorSpanish-speakingcountries,especiallythosecountriesinLatinAmerica西班牙（人）的；西班牙语言（文化）的；（尤指拉丁美洲）西班牙语国家的

4.lockdown:asituationinwhichpeoplearenotallowedtoenterorleaveabuildingorareafreelybecauseofanemergency（建筑或地区）因紧急情况而被封锁了

背景知识

美国枪击日历是根据媒体报道统计的美国重大枪击事件中丧生及受伤人员情况。由于历史原因，美国形成了根深蒂固的枪支文化，美国枪击案爆发频率越来越高，枪支暴力事件远超世界上其他发达国家。美国人拥有约2.65亿支枪，每位成年人都有超过1支枪，平均每10天有9天是枪击日。美国枪支暴力档案室网站发布的数据显示，2018年全年，美国共发生涉枪案件57103件，导致14717人死亡、28172人受伤，其中未成年人死伤3502人。

参考答案

Question1:A

Question2:D