肘关节后方脱位时().
A.靴状畸形
B.餐叉样畸形
C.枪刺样畸形
D.方肩畸形
E.患肢屈曲、内收、内旋畸形
参考答案:A
如图所示,在x轴上方有一匀强电场,场强大小为E,方向竖直向下.在x轴下方有一匀强磁场,磁感应强度为B,方向垂直于纸面向里.在x轴上有一点p,离原点距离为a.现有一带电量为+q,质量为m的粒子,不计重力,从0<x<a区间某点由静止开始释放后,能经过p点.试求:
(1)释放瞬间粒子的加速度;
(2)释放点的坐标x、y应满足的关系式?
The general at last got a chance to visit the village_________he used to fight, _________he had been dreaming of for years.
A.that; which
B.where; that
C.in which; what
D.where; which