The idea of a way out of the trouble had never________to anyone.
A:happened
B:occurred
C:appeared
D:flashed
如图,在等边△ABC中,AB=10,BD=4,BE=2,点P从点E出发沿EA方向运动,连接PD,以PD为边,在PD右侧按如图方式作等边△DPF,当点P从点E运动到点A时,点F运动的路径长是( )
下列实验操作中,能达到预期目的是( )