[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fFmWNcEMAZrJ_GIYw_6--ebCZm0DSyxVEd61SVwL9_Vs":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":16,"related":17,"source":27,"type":41},[],"2026-05-07 01:27:09",359788301,[8,9,10,11],"A single character can be regarded as a string of length 1","String negative index from right to left, from-1 by default","You can create strings with either single quotes or double quotes","Special characters such as a change-line return can be included in a three-quote string",{"courseId":13,"courseImg":14,"courseName":15},"53e1d2ef4961cca8eea3e23969ad2cb9","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03a579384a6dc297c89809b582fcc767.png","默认课程","The following correct statement about the string is ()",[18,29,38,42,50],{"answer":19,"createTime":5,"id":20,"options":21,"question":26,"source":27,"type":28},[],359788299,[22,23,24,25],"'-VAT payable'","'VAT payable-'","'Pay VAT'","'VAT payable'","string str 1 = "tax payable-VAT payable-input tax", the output result of the execution statement str 1 [5:10] is ()","v1",0,{"answer":30,"createTime":5,"id":31,"options":32,"question":37,"source":27,"type":28},[],359788300,[33,34,35,36],"1","-1","0","2","The last element in a Python string of any length is subscripted as ()",{"answer":39,"createTime":5,"id":6,"options":40,"question":16,"source":27,"type":41},[],[8,9,10,11],1,{"answer":43,"createTime":5,"id":44,"options":45,"question":48,"source":27,"type":49},[],359788302,[46,47],"正确","错误","There are two indexes in Python string: positive index and negative index. Negative index, right to left, from 0 by default",3,{"answer":51,"createTime":5,"id":52,"options":53,"question":54,"source":27,"type":49},[],359788303,[46,47],"The positive index in Python is from left to right, starting from 0 by default"]