—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
下列生物的生殖方式中,属于有性生殖的是( )
在点电荷 Q形成的电场中有一点A,当一个﹣q的检验电荷从电场的无限远处被移到电场中的A点时,电场力做的功为W,则检验电荷在A点的电势能及电场中A点的电势分别为( )