141.在道床电路1.5Ω.km、传输电缆长度为10km的条件下,ZPW-2000A型无绝缘轨道电路载频为1700Hz时,其轨道电路极限长度应为( )m。

354.A355.C356.A357.A358.C359.B360.A361.D362.C363.C364.C365.C366.D

341.B342.D343.D344.A345.C346.D347.A348.C349.D350.D351.D352.A353.A

328.D329.D330.B331.D332.C333.D334.A335.C336.A337.B338.D339.B340.C

315.C316.D317.B318.D319.A320.C321.A322.A323.C324.D325.A326.C327.C

302.C303.B304.B305.B306.A307.C308.A309.A310.A311.B312.B313.B314.B

289.C290.D291.A292.B293.D294.A295.C296.C297.B298.A299.D300.B301.A

276.D277.D278.D279.B280.C281.A282.A283.A284.A285.D286.B287.B288.D

263.C264.D265.C266.D267.A268.C269.A270.C271.D272.D273.C274.A275.A

250.A251.D252.D253.A254.C255.A256.C257.A258.D259.B260.D261.A262.C

237.A238.A239.C240.C241.B242.C243.C244.A245.C246.C247.D248.A249.B