[简答]  二、阅读理解：阅读下面的短文，根据文章内容从A、B、C三个选项中选出一个最佳选项。High-speedrail isatypeof railtransport thatoperatessignificantlyfasterthantraditionalrailtraffic,usinganintegratedsystemofspecialized rollingstock anddedicatedtracks.Whilethereisnosinglestandardthatappliesworldwide,newlinesinexcessof250 km/hrandexistinglinesinexcessof200 km/hrarewidelyconsideredtobehigh-speed,withsomeextendingthedefinitiontoincludemuchlowerspeeds(e.g.160 km/hr)inareasforwhichthesespeedsstillrepresentsignificantimprovements. ThefirstsuchsystembeganoperationsinJapanin1964andwaswidelyknownasthe bullettrain.High-speedtrainsnormallyoperateon standardgauge tracksofcontinuouslyweldedrailongrade-separatedright-of-waythatincorporatesalargeturningradiusinitsdesign.Manycountrieshavedevelopedhigh-speedrailtoconnectmajorcities,includingAustria,Belgium,China,France,Germany,Italy,Japan,Poland,Portugal,Russia,SouthKorea,Sweden,Taiwan,turkey,UnitedKingdom,UnitedStatesandUzbekistan.OnlyinEuropedoesHSRcrossinternationalborders.Chinahas16,000 kmofHSR,accountingfor60percentoftheworld’stotal.Whilehigh-speedrailisusuallydesignedforpassengertravel,somehigh-speedsystemsalsooffer freight service. 1.High-speedrail isatypeof railtransport thatoperatessignificantly thantraditionalrailtraffic.A.faster    B.slowerC.asfastas2.Accordingtothepassage,whichofthefollowingistrue?A.thereisnosinglestandardthatappliesworldwide.B.thereisastandardthatappliesworldwideC.therearetwostandardsthatapplyworldwide3.Whendid thefirstsuchsystem widelyknownasthe bullettrain beginoperations inJapan ?A.in1964B.in1966C.in19464. Theunderlinedword“ freight” attheendoftheparagraphmeans.A.military                B. cargo        C. health5.Thebesttitleofthispassagewouldbe“”.A.TraditionalRailTraffic      B.the BulletTrain     C.High-speedRail