[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fi4oxKsZZmQtBsNhLNfYA2vT04RjdzZMHSDpDpr2DbTM":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":16,"related":17,"source":21,"type":22},[],"2026-05-10 21:29:34",1083839817,[8,9,10,11],"Stable","Unstable","Self-excited oscillation","Critical stable",{"courseId":13,"workId":14,"workName":15},"1000114120","63527636","第九章单元测试","If the final phase trajectory of a nonlinear system is a closed ring, then the state of this nonlinear system is( )",[18,23,32,41,46],{"answer":19,"createTime":5,"id":6,"options":20,"question":16,"source":21,"type":22},[],[8,9,10,11],"v2",0,{"answer":24,"createTime":5,"id":25,"options":26,"question":31,"source":21,"type":22},[],1083839833,[27,28,29,30],"A straight line","Composed of linear and saturated segments","Exponential curve","Sine curve","The shape of the saturation characteristic input-output curve is ( )",{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":21,"type":22},[],1083839848,[36,37,38,39],"More regular shape","Possible existence of limit cycles","A closed curve","Without singular point","Compared with the phase trajectory of linear systems, the phase trajectory of nonlinear systems is( )",{"answer":42,"createTime":5,"id":43,"options":44,"question":45,"source":21,"type":22},[],1083839856,[8,9,10,11],"If the final phase trajectory of a nonlinear system is a helix that converges to the origin, then the state of the nonlinear system is( )",{"answer":47,"createTime":5,"id":48,"options":49,"question":53,"source":21,"type":22},[],1083840052,[50,51,52,29],"Continuous and smooth","Piecewise linear","Having jumping discontinuity points","The input-output curve of relay characteristics is ( )"]