[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fPuaHu1gN5iubm0nXrfWxlW0S18juSakrsRPG9KJnbPY":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":10,"question":17,"related":18,"source":29,"type":82},[],"2025-12-11 09:11:22",259569696,[8,9],"正确","错误",{"count":11,"courseId":12,"courseImg":13,"courseName":14,"workId":15,"workName":16},22,"292cc22b52e66bd3a2e2a4da29296b2a","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F48eba3395437dd881b1b9275a0ad1028.png","化工机械基础","work_49020566","第三章 直梁的弯曲","梁横截面上任一点的正应力 与同一截面上的弯矩 及该点到中性轴的距离成正比,而与截面轴惯性矩成反比",[19,31,40,49,58,68,77,83,86,91],{"answer":20,"createTime":21,"id":22,"options":23,"question":28,"source":29,"type":30},[],"2025-12-23 10:42:43",259569682,[24,25,26,27],"曲线,突变","直线,突变","曲线,转折","直线,转折","梁受集中力作用时,弯矩图应为(),并且在集中力作用处,弯矩发生()","v1",0,{"answer":32,"createTime":21,"id":33,"options":34,"question":39,"source":29,"type":30},[],259569685,[35,36,37,38],"弯曲","扭转","拉伸","压缩","在化工厂中,以()为主要变形的构件在工程上称之为梁",{"answer":41,"createTime":21,"id":42,"options":43,"question":48,"source":29,"type":30},[],259569687,[44,45,46,47],"4","2","3","0.5","对于矩形截面h:b=2:1的杆件,其截面对称轴的最大轴惯性矩是最小轴惯性矩的( )倍",{"answer":50,"createTime":21,"id":51,"options":52,"question":57,"source":29,"type":30},[],259569689,[53,54,55,56],"槽形截面","方形截面","圆截面","工字形","梁弯曲时在选择杆件截面形状时,优先选用以下哪种截面",{"answer":59,"createTime":21,"id":60,"options":61,"question":66,"source":29,"type":67},[],259569691,[62,63,64,65],"简支梁","悬壁梁","外跨梁","外伸梁","从梁的支座结构形式来分",1,{"answer":69,"createTime":21,"id":70,"options":71,"question":76,"source":29,"type":67},[],259569693,[72,73,74,75],"用延伸率大的材料","选择截面的合理工作位置","合理安排支座位置","选用合理的截面形状","提高梁弯曲强度的主要途径为",{"answer":78,"createTime":5,"id":79,"options":80,"question":81,"source":29,"type":82},[],259569694,[8,9],"由梁的正应力分布规律,纵向纤维的应变ε与y成反比",3,{"answer":84,"createTime":5,"id":6,"options":85,"question":17,"source":29,"type":82},[],[8,9],{"answer":87,"createTime":5,"id":88,"options":89,"question":90,"source":29,"type":82},[],259569698,[8,9],"纯弯曲是指杆件横截面上无剪应力",{"answer":92,"createTime":5,"id":93,"options":94,"question":95,"source":29,"type":82},[],259569700,[8,9],"当考虑横截面上的剪力Q,我们称之为横力弯曲"]