[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fpgo4cNkXmkNM0YmLGm_JDIhp3_dn2V483voWVgMVsMA":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":18,"related":19,"source":23,"type":24},[],"2023-05-08 23:10:31",89044507,[8,9,10,11],"50kN,拉","60kN,压","100kN,拉","100kN,压",{"courseId":13,"courseImg":14,"courseName":15,"workId":16,"workName":17},"1000001648","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ffd824b0800f018a950471d4086ad785f.jpg","理论力学","35763920","第二章单元测试","构件尺寸如图(单位m),不计各杆件自重,载荷F=60kN.则杆BD的内力为( ).\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F47abe26274ae249167ee1c04d1ba984a.png\">",[20,25,34,42,52],{"answer":21,"createTime":5,"id":6,"options":22,"question":18,"source":23,"type":24},[],[8,9,10,11],"v2",0,{"answer":26,"createTime":5,"id":27,"options":28,"question":33,"source":23,"type":24},[],89044511,[29,30,31,32],"0, F ,F \u002F2","F \u002F2,F , 0","0,F ,0","0,F \u002F2,0","图示桁架受到大小均为F 的三个力作用,则杆1、2、3的内力大小依次为( ).\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F99bb956182632bf1b1c89511bbad7701.png\">",{"answer":35,"createTime":5,"id":36,"options":37,"question":40,"source":23,"type":41},[],89044518,[38,39],"对","错","若某物体受一平面力系作用而平衡,则可根据此力系的平衡条件列出三个平衡方程,从而可以求解出三个未知量.( )",3,{"answer":43,"createTime":5,"id":44,"options":45,"question":50,"source":23,"type":51},[],89044525,[46,47,48,49],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F1c67e173c939b3090a66ba82d24ea9f2.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7f8f39d9db05c929c9dd3d2dab77b45f.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F434c6e5a312e7ef3734fe252a7581c37.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0cf28467aba16936854603495a75a0d2.png\">","图示四个力F1、F2、F3、F4,下列它们在y轴上投影的计算式中,哪些是正确的?( )\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fae8aef9dbb0be037790eaf40bd0f56a8.png\">",1,{"answer":53,"createTime":5,"id":54,"options":55,"question":56,"source":23,"type":41},[],89044529,[38,39],"力偶可以在其作用面内任意旋转和平移而不改变其对物体的作用效果.( )"]