[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fdHM_z1BGmSy8FXjzAFE6_xq5QbzeqoDHMs6iH8NQDLA":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2023-11-11 19:25:35",105133692,[8,9,10,11],"60&deg;","45&deg;","30&deg;","25&deg;",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},29,"b64c21c73f874826924fb6a982edd6ba","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9c1e48361b00f3ee2086f4e259ed792b.jpg","机械设计","377b3d4b5bbb40008e3ef267066a710b","章节测试","我国国家标准中规定普通螺纹的牙形角为( )",[21,32,41,49,58,67,76,85,88,96],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],105133685,[25,26,27,28],"作为连接的防松装置","减小螺栓连接的刚度","使螺母中各圈螺纹受力均匀","防止螺栓受弯曲载荷","在螺纹连接中,采用悬置螺母的主要作用是( )","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],105133686,[36,37,38,39],"弯曲和挤压","拉伸和剪切","剪切和挤压","扭转和弯曲","当采用铰制孔用螺栓联接承受横向载荷时,螺栓杆受到( )作用",{"answer":42,"createTime":5,"id":43,"options":44,"question":19,"source":30,"type":31},[],105133687,[45,46,47,48],"60&ordm;","45&ordm;","30&ordm;","25&ordm;",{"answer":50,"createTime":5,"id":51,"options":52,"question":57,"source":30,"type":31},[],105133688,[53,54,55,56],"受切应力","受扭转切应力和拉应力","受拉应力","既可能只受切应力又可能只受拉应力","在承受横向载荷的普通紧螺栓组连接中,螺栓杆( )作用",{"answer":59,"createTime":5,"id":60,"options":61,"question":66,"source":30,"type":31},[],105133689,[62,63,64,65],"600","800","480","680","普通6.8级螺栓的屈服强度为( )MPa",{"answer":68,"createTime":5,"id":69,"options":70,"question":75,"source":30,"type":31},[],105133690,[71,72,73,74],"升角的大小","旋向","牙型角的大小","螺距的大小","普通螺纹中同一公称直径按( )分为粗牙螺纹和细牙螺纹",{"answer":77,"createTime":5,"id":78,"options":79,"question":84,"source":30,"type":31},[],105133691,[80,81,82,83],"右旋螺纹不必注明","左旋螺纹不必注明","左、右旋螺纹都必须注明","左、右旋螺纹都不必注明","标注螺纹时( )",{"answer":86,"createTime":5,"id":6,"options":87,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":89,"createTime":5,"id":90,"options":91,"question":95,"source":30,"type":31},[],105133693,[92,93,94],"大","中","小","普通螺纹的公称直径是指其( )径",{"answer":97,"createTime":5,"id":98,"options":99,"question":100,"source":30,"type":31},[],105133694,[92,93,94],"计算螺杆强度时,应采用的螺纹直径是( )径"]