A:a→c→d→b
B:a→b→c→d
C:c→d→a→b
D:a→d→b→c
如图所示,光滑斜面AE被分成四个长度相等的部分,即AB=BC=CD=DE,一物体从A点由静止释放,下列结论中正确的是( )
His wife is constantly finding ____ (过错)with him,which makes him very angry.
已知一颗粒子等可能地落入如右图所示的四边形ABCD内的任意位置,如果通过大量的实验发现粒子落入△BCD内的频率稳定在25附近,那么点A和点C到时直线BD的距离之比约为( )