[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fVTAObr_khQs8fTsQPOrXvlusy6MTFwyD3sY5ub5zNjM":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":15,"related":16,"source":24,"type":45},[],"2025-12-26 09:15:36",1070247170,[8,9,10,11],"Rail cross-section","Rail foot","Rail shoulder","Rail root",{"courseImg":13,"courseName":14},"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb08a353b0dfc60dc6f890a2e9b036890.jpg","[共享课]Introduction to Railway","What is the term for the part of the rail that consists of the rail head, rail web, and rail base?( )",[17,26,36,46,49,58],{"answer":18,"createTime":5,"id":19,"options":20,"question":23,"source":24,"type":25},[],1070247040,[21,22],"对","错","The high price of insulating material polyethylene makes the CC mode for power supply a cost-effective solution. True or False? ( )","v2",3,{"answer":27,"createTime":5,"id":28,"options":29,"question":34,"source":24,"type":35},[],1070247064,[30,31,32,33],"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":37,"createTime":5,"id":38,"options":39,"question":44,"source":24,"type":45},[],1070247096,[40,41,42,43],"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":47,"createTime":5,"id":6,"options":48,"question":15,"source":24,"type":45},[],[8,9,10,11],{"answer":50,"createTime":5,"id":51,"options":52,"question":57,"source":24,"type":45},[],1070247181,[53,54,55,56],"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":59,"createTime":5,"id":60,"options":61,"question":62,"source":24,"type":25},[],1070247393,[21,22],"The Sichuan-Tibet Railway is the most difficult railway to build in the world. ( )"]