题干

下列关于匀强电场场强和电势差的关系中,正确的是(   )

A:相同距离上的两点,电势差大的其场强也必定大

B:任意两点间的电势差等于场强和这两点间距离的乘积

C:沿电场线方向任何相同距离上电势降落必定相等

D:电势降低的方向必定不是电场强度的方向

上一题 下一题 0.0难度 选择题 更新时间:2015-08-12 10:55:21

答案(点此获取答案解析)

C

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    In the village of Kila Raipur, people would like to take part in their unusual Olympics. Even though the villagers don't spend millions of dollars on the sport, these games seem to be much more fun than the real Olympics!

    Now in its 77th year, the sport took place in the village Kila Raipur in an Indian state from January 31st to February 3rd. A villager by the name of Inder Singh Grewal wanted to organize an event which would allow farmers to show their skills, keep their culture and just have a good time.

    Over the years, it has become popular and now includes not just the farmers, but also some of the world's finest athletes from 7 to 70 years of age. In keeping up with times, there are different modern sports, such as hockey and race and traditional ones such as tug-of-war and even Kabaddi.

    However, the ones that interest the biggest crowds are the special sports like the bull(公牛)races. In the races, bulls run at high speed against each other, with athletes balanced on small carts(手推车). Then there is the game that challenges athletes to lift bicycles with their teeth. Another sport is using their teeth to pull a car. If that is not special enough for you to get excited about this, there is a competition that allows a tractor(拖拉机) to run over an athlete's body!

    All in all, the sport not only tests the skills and strength of its athletes, but also cheers up people. The best part is that everyone, old or young, can take part in the sport. So it's no wonder that over 4,000 athletes and over a million watchers run into the small village of Kila Raipur, each year!