如图所示, 放在光滑水桌面上的滑块Q与轻质弹簧相连,Q静止,P以某一初速度向Q运动,P、Q质量均为,与轻位于簧发生碰撞的整个过程中,弹簧具有的最大弹性势能为多少?
The bad news that they had received from doctors meant the ________ of all their hopes.[ ]
A.ruin
B.result
C.loss
D.failure
通过二次造粒进行水解进料。