阅读理解Asweallknowmostcountriesintheworlddriveontherightbutthereare75countriesthatdriveontheleftincludingtheUKJapanJamaicaandothers.Whyisthis?I
阅读理解
Asweallknowmostcountriesintheworlddriveontherightbutthereare75countriesthatdriveontheleftincludingtheUKJapanJamaicaandothers.Whyisthis?
Infactsomebelievethatancienttravellersonhorsebackgenerallyrodeontheleftsideoftheroad.Asmostpeopleareright-handedhorsemenwouldthusbeabletoholdthereins(缰绳)withtheirlefthandandkeeptheirrighthandfree-toofferfriendshiptopassingridersortoprotectthemselveswithasword(剑)ifnecessary.
ThefirstlawinBritainfortraffictoremainontheleftappearedin1756whichwasrelatedtoLondonBridge.TheHighwayActof1773containedasuggestionthathorsetrafficshouldremainontheleft.TheBritishhadsmallwagons(马车)andthedriverusuallysatontherightsideofthefrontseat.Fromtherehecouldusehislongwhip(马鞭)inhisrighthand.Inthatpositionontherightsideofthewagonthedrivercouldmakesurehiswagonandthepassingtrafficwerebothsafebykeepingtotheleft-handsideoftheroad.
CountriesthatbecamepartoftheBritishEmpirefollowedthekeep-leftruletooalthoughthereweresomeexceptions.InCanadaforexampleVancouverandothercoastalprovinceschangedtotherightinordertomakebordercrossingstoandfromtheUnitedStateseasier.DuringWorldWarIIAmericantruckmakersFordChevroletandChryslerbuilt"CanadianMilitaryPattern"trucksforusethroughouttheBritishEmpireandmosttruckswereright-hand-drive.
(1)
Thefirstparagraphmainlyservesasa(n)________.
[]A.
background
B.
conclusion
C.
introduction
D.
explanation
(2)
Ancienthorseridersrodeonthelef