[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fKYY4LV3_ClSklHF8p89Qatusj39Jnzfq_TYfVSErQ_g":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":10,"question":13,"related":14,"source":20,"type":21},[],"2025-12-26 09:15:36",1070247393,[8,9],"对","错",{"courseImg":11,"courseName":12},"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb08a353b0dfc60dc6f890a2e9b036890.jpg","[共享课]Introduction to Railway","The Sichuan-Tibet Railway is the most difficult railway to build in the world. ( )",[15,22,32,42,51,60],{"answer":16,"createTime":5,"id":17,"options":18,"question":19,"source":20,"type":21},[],1070247040,[8,9],"The high price of insulating material polyethylene makes the CC mode for power supply a cost-effective solution. True or False? ( )","v2",3,{"answer":23,"createTime":5,"id":24,"options":25,"question":30,"source":20,"type":31},[],1070247064,[26,27,28,29],"They are considered the "heart" of an electric traction power supply system","They have dual power supplies","They are also called main transformers","They convert three-phase 110 KV AC into the single-phase 27.5 kV AC","What are the two keywords about traction substations mentioned in this chapter? ( )",1,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":20,"type":41},[],1070247096,[36,37,38,39],"Network-wide railway junction terminal","Regional railway junction terminal","Local railway junction terminal","Industrial railway junction terminal","What type of railway junction terminal is generally located at a railway network end or in the areas of large industrial enterprises?( )",0,{"answer":43,"createTime":5,"id":44,"options":45,"question":50,"source":20,"type":41},[],1070247170,[46,47,48,49],"Rail cross-section","Rail foot","Rail shoulder","Rail root","What is the term for the part of the rail that consists of the rail head, rail web, and rail base?( )",{"answer":52,"createTime":5,"id":53,"options":54,"question":59,"source":20,"type":41},[],1070247181,[55,56,57,58],"Structural clearance","Rolling stock clearance","Clearance for exceeding goods","Safety clearance","Which clearance is mainly used for loads that surpass typical size or weight limitations? ( )",{"answer":61,"createTime":5,"id":6,"options":62,"question":13,"source":20,"type":21},[],[8,9]]