阅读理解

ThefirstbullettraindesignedandmanufacturedinChinawithaspeedof300kilometersperhourrolledofftheproductionlineonSaturdaymorning．Thetrainwasthelatestmodelinthecountry'sChinaRailwayHigh-speed(CRH)Series．ThismarksthatChinahasjoinedaleadingworldclubafterJapanFranceandGermanytobecomethefourthcountrycapableofturningoutsuchhighspeedtrains．PreviouslyChina'sfastestself-developedtrainsranataservicespeedofupto250kmperhour．

ThosetrainswhichpresentedtopubliconApril18servedtheBeijing－HarbinBeijing－ShanghaiandBeijing－Guangdongroutes．Thenewstreamlinedtrainwasmadeofaluminumalloy(铝合金)．Thetrainbodywasthelightestofitskindintheworld．Suchadesignwasforthesakeofenergyeconomization．Thetrain'spowerwas12.7kilowattslowerthanotherhigh-speedtrainswhichwasnormallyabout15kilowatts．

Thenewtrainwhichfeaturesabarinthedinnercaranddouble-facedLCDTVscreensinthefirst-classcarswasequippedwithshockabsorbersbetweencarriages．Asthetrainisrunningatahighspeedtheshockabsorbersareusedtoreduceshockingforceandrockingofthetrainbody．(Atrainwitheightcarriagescouldseatabout600passengers．Theywereexpectedtorunonthe115－kmBeijing–TianjinroutestartingfromAugustbeforetheBeijingOlympicGames．)Itwouldreducethejourneytimefromthecurrent80minutestoaround39minutes．

A．

thelatestmodelofCRHSeriesranataservicespeedofupto250kmperhour

B．

Chinabecamethefourthcountryintheworldtoproducebullettrainsofsuchahighspeed

C．

thefirstself-developedbullettrainrolledofftheproductionlineataspeedof300kmperhour

D．

Chinahasjoinedalead