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  Eachtunnelisroughlyroundandthelowerpartofthetunnelissomewhatflat.Thesurfaceoftheroadliesonthebase,whichismadeofconcreteandsteel.Thedrainagesystem(排水系统),justbelowtheroadsurfaceononeside,remo

  Eachtunnelisroughlyroundandthelowerpartof

  thetunnelissomewhatflat.Thesurfaceoftheroadlies

  onthebase,whichismadeofconcreteandsteel.The

  drainagesystem(排水系统),justbelowtheroadsurface

  ononeside,removesanyextraliquid,particularlywater.

  Intheeventoffire,thefiremain,whichismadeofsteel,

  pipeswatertomanyfirehydrantstationsatregularintervals

  alongthelengthofthetunnel.Thefiremainisatthesideofthetunnel,andattheleveloftheroadsurface.

  Othersystemsinthetunnelwillincludeemergencyphones.1.Eachofthetunnelsunderconstructionis_____.A.eightkilometerslongandtwentymetreswide

  B.eightkilometerslongandsixmetreswide

  C.fourkilometerslongandtwentymetreswide

  D.fourkilometerslongandsixmetreswide2.Whichpartofthetunnelinthediagramisusedtopipeoutextrawater?A.1.

  B.3.

  C.5.

  D.6.3.Drivinginthetunnel,onecanknowthetrafficconditionsaheadthrough_____.A.thelights

  B.theelectronicsigns

  C.thetrucksandcars

  D.theemergencyphones4.Thepassageismainlyabout_____.A.theconstructionofaroad

  B.thedesignofaroad

  C.theconstructionoftwotunnels

  D.thedesignoftwotunnels

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2020-05-16 18:02
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