—Yes. She said we should meet there at nine.
A:which was the way to the station
B:why we should meet at the station
C:when we should get to the station
D:who we should meet at the station
如图所示,将生长良好的甲、乙、丙3盆植物放在阳台上,甲盆定期浇适量水,乙、丙两盆不浇水.15天后,甲、丙两盆植物均存活,乙盆植物枯死.对此实验,下列解释或推论合理的是( )
读图回答。
两点电荷间距离为r时,相互作用力为F,当距离变为r/2时,它们之间相互作用力为____F,为使作用力仍为F,则两点电荷的电量可同时为原来的____倍.