在静电场中，下列说法中正确的是：

A．电场强度为零的点，电势也一定为零

B．电场强度处处相等的区域内，电势也一定处处相等

C．只在电场力作用下，正电荷一定从电势高的地方向电势低的地方移动

D．沿着电场线方向电势一定越来越低

The word "sport" first meant something that people did in their (36) time. Later it often meant (37) wild animals and birds. About a hundred years ago the word was first used for (38) games, which is its usual (39) today. People spend their spare time playing football, basketball, tennis and many other sports. Such people play because they want to. Some people are (40) for the sport they play. These people are called (41) sportsmen. They may be sportsmen for only a few years, but many of them can earn a lot of money. Of course, it is only (42) for a few sportsmen to earn much money in sports for (43) , like golf, tennis and (44) racing. (45) . They allow the companies to use their names or photographs and are paid for this. (46)