[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f7-00yiYhYHDiUUVQftD8SqIewSCeMxdZnVF_YSKBbbg":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":8,"question":12,"related":13,"source":23,"type":73},[],"2026-04-25 09:09:37",350700965,[],{"courseId":9,"courseImg":10,"courseName":11},"3d3d70f1f9df5c1e4b86baea7bcf7957","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd9eaef8ea2690faba12fec4caf2d0cf6.jpg","机械原理","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]",[14,25,34,43,52,61,70,74,79,84],{"answer":15,"createTime":5,"id":16,"options":17,"question":22,"source":23,"type":24},[],350700959,[18,19,20,21],"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":26,"createTime":5,"id":27,"options":28,"question":33,"source":23,"type":24},[],350700960,[29,30,31,32],"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","以下关于速度瞬心的说法错误的是( ).[武汉科技大学2019年研]",{"answer":35,"createTime":5,"id":36,"options":37,"question":42,"source":23,"type":24},[],350700961,[38,39,40,41],"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":44,"createTime":5,"id":45,"options":46,"question":51,"source":23,"type":24},[],350700962,[47,48,49,50],"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":53,"createTime":5,"id":54,"options":55,"question":60,"source":23,"type":24},[],350700963,[56,57,58,59],"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":62,"createTime":5,"id":63,"options":64,"question":69,"source":23,"type":24},[],350700964,[65,66,67,68],"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":71,"createTime":5,"id":6,"options":72,"question":12,"source":23,"type":73},[],[],2,{"answer":75,"createTime":5,"id":76,"options":77,"question":78,"source":23,"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":23,"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":23,"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]"]