[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$flO-rfw1mAqeoGVmgTzsTMkxw2yXmGZR3vnDR1ipMRn0":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":16,"related":17,"source":27,"type":28},[],"2026-04-25 09:09:37",350700960,[8,9,10,11],"一个平面机构有6个构件,则共有12个瞬心","机构中某个构件和机架构成的瞬心一定是绝对瞬心","两个互相啮合传动的齿轮的瞬心在过接触点的齿廓公法线上","一个平面四杆机构中,绝对瞬心和相对瞬心的数目是一样的",{"courseId":13,"courseImg":14,"courseName":15},"3d3d70f1f9df5c1e4b86baea7bcf7957","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd9eaef8ea2690faba12fec4caf2d0cf6.jpg","机械原理","以下关于速度瞬心的说法错误的是( ).[武汉科技大学2019年研]",[18,29,32,41,50,59,68,74,79,84],{"answer":19,"createTime":5,"id":20,"options":21,"question":26,"source":27,"type":28},[],350700959,[22,23,24,25],"瞬时角速度","瞬时加速度","瞬时相对速度","瞬时绝对速度","速度瞬心是两体上( )为零的重合点.[武汉科技大学2020年研]","v1",0,{"answer":30,"createTime":5,"id":6,"options":31,"question":16,"source":27,"type":28},[],[8,9,10,11],{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":27,"type":28},[],350700961,[36,37,38,39],"法向、切向","绝对、相对","法向、合成","切向、绝对","在加速度多边形中,连接极点到任意一点的矢量,表示构件上相应点的( )加速度;连接任意两点间的矢量,表示构件上相应两点的( )加速度.[浙江理工大学研]",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":27,"type":28},[],350700962,[45,46,47,48],"组成同一机构","彼此相连","同一平面内运动","速度相同","三心定理的准确描述:( )的三个构件的三个瞬心必位于同一直线上.[浙江工业大学2017年研]",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":27,"type":28},[],350700963,[54,55,56,57],"直线","圆弧","椭圆","复杂平面曲线","图3-3-1所示连杆机构中滑块上E点的轨迹应是( ).[江苏科技大学2016年研]\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fdb8aa14eee48e8a737ed57f0d24838ca.png\">",{"answer":60,"createTime":5,"id":61,"options":62,"question":67,"source":27,"type":28},[],350700964,[63,64,65,66],"两点间相对速度为零,但两点绝对速度不等于零","两点间相对速度不等于零,但其中一点的绝对速度等于零","两点间的相对速度不等于零且两点的绝对速度也不等于零","两点间的相对速度和绝对速度都等于零","在两构件的相对速度瞬心处,瞬时重合点间的速度应有( ).[江苏科技大学2016年研]",{"answer":69,"createTime":5,"id":70,"options":71,"question":72,"source":27,"type":73},[],350700965,[],"速度瞬心是两构件上____速度为零的重合点,也就是两构件在该瞬时具有相同____速度的重合点.[华中农业大学2016年研]",2,{"answer":75,"createTime":5,"id":76,"options":77,"question":78,"source":27,"type":73},[],350700966,[],"一个运动矢量方程只能求解____个未知量.[安徽工业大学2016年研]",{"answer":80,"createTime":5,"id":81,"options":82,"question":83,"source":27,"type":73},[],350700967,[],"铰链四杆机构共有____个速度瞬心,其中____个是绝对瞬心,____个是相对瞬心.[河北工程大学2016年研]",{"answer":85,"createTime":5,"id":86,"options":87,"question":88,"source":27,"type":73},[],350700968,[],"当两个构件组成移动副时,其瞬心位于垂直于移动方向的____处.当两构件组成纯滚动的高副时,其瞬心就在____点.当求机构的不互相直接连接各构件间的瞬心时,可应用____来求.[安徽工业大学2016年研]"]