[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fCSonPWfP6tvmEYdrVz75R2XzTBCb-2IxOXlttjl73ew":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":31,"type":32},[],"2026-01-15 21:32:41",313056057,[8,9,10,11],"演绎法","描述性统计","归纳法","推论性统计",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},53,"53e1d2ef4961cca8eea3e23969ad2cb9","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03a579384a6dc297c89809b582fcc767.png","默认课程","work_45774838","机制221-224第二次作业","主要对调查结果进行统计推论,会涉及样本抽取、代表性问题、研究工具的信度和效度等,对调查数据进行方差分析、相关分析、回归分析等统计判断,从样本推断到总体的过程.",[21,33,42,50,55,60,66,71,80,89],{"answer":22,"createTime":23,"id":24,"options":25,"question":30,"source":31,"type":32},[],"2025-11-21 05:41:49",238127747,[26,27,28,29],"扩大组的传动副数为定值","基本组的传动副数为固定值","基本组的级比指数为定值","扩大组的级比指数只与基本组传动副数有关","下列关于级比规律表述正确的是( )","v1",0,{"answer":34,"createTime":23,"id":35,"options":36,"question":41,"source":31,"type":32},[],238127748,[37,38,39,40],"12","9","10","11","已知公比1.41,转速区间:31.5&mdash;1400r\u002Fmin,主轴转速级数为()",{"answer":43,"createTime":23,"id":44,"options":45,"question":48,"source":31,"type":49},[],238127749,[46,47],"正确","错误","机床的主轴转速都是严格按照等比数列,选取标准数值得到的",3,{"answer":51,"createTime":23,"id":52,"options":53,"question":54,"source":31,"type":49},[],238127750,[46,47],"卧式支承的机床,重心低,刚度大,是中小型机床的首选支承形式",{"answer":56,"createTime":23,"id":57,"options":58,"question":59,"source":31,"type":49},[],238127751,[46,47],"公比越小,最大相对转速损失率就越小,因此公比越小越好",{"answer":61,"createTime":23,"id":62,"options":63,"question":64,"source":31,"type":65},[],238127752,[],"已知某机床厂设计人员要设计某普通铣床的主传动系统,已知主轴最高转速nmax=1600r\u002Fmin,主轴最低转速nmin=125r\u002Fmin,电动机转速n电=1500r\u002Fmin,主轴转速公比为&Phi;=1.26,请计算主轴转速级数,并根据标准转速列表查主轴各级的转速数值. \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fdd76adb32d522f6c7233c0e8997160d7.png\">",4,{"answer":67,"createTime":23,"id":68,"options":69,"question":70,"source":31,"type":65},[],238127753,[],"写出24级传动的结构式",{"answer":72,"createTime":5,"id":73,"options":74,"question":79,"source":31,"type":32},[],313056046,[75,76,77,78],"社会心理分析","评估体系研究","比较分析","专家预测","中日大众体育的对比研究属于体育社会学研究的( )课题类型.",{"answer":81,"createTime":5,"id":82,"options":83,"question":88,"source":31,"type":32},[],313056047,[84,85,86,87],"媒介","规模","主体","形式","从互动的( )来看,有借助于语言的互动和借助于非语言的互动.(2分) 主体 D.形式",{"answer":90,"createTime":5,"id":91,"options":92,"question":97,"source":31,"type":32},[],313056048,[93,94,95,96],"微观的体育公共政策视角","中观的体育社会资本视角","微观的体育参与视角","宏观的体育公共政策视角","下列最新国际体育政策的体育社会问题研究视角中不正确的是( )"]