【简答题】-The Dragon Boat races are so exciting, but our boat is still behind.- -Don't worry. I am sure ___our team will win!A. if B. / C. whether D. of
【单选题】Our boat was surrounded by a large _________ of dolphins.
【单选题】关于电场力和电场强度,有下列几种说法。可以判断,其中正确的是[ ]
A.
电场中某点电场强度的方向,就是放在该点检验电荷所受电场力的方向
B.
两点电荷之间的相互作用力一定遵守牛顿第三定律