把电荷量q=1.0×10－5C的电荷从A点移到B点，电场力做功W=2.0×10－2J，则AB两点的电势差UAB= ，若规定A点为零电势，则电荷在B点的电势能EPB为 ；B点的电势
= 。
2000V -2.0×10-2J -2000V
根据公式
，若规定A点为零电势，则b点电势为
，B点的电势能EPB=
故答案为：2000V；
；2000V
I went to a group activity，“Sensitivity Sunday”，which was to make us more ____the problems faced by disabled people.We were asked to “____ a disability”for several hours one Sunday.Some members，___，chose to use wheelchairs.Others wore sound－blocking earplugs(耳塞) or blindfolds(眼罩)． Just sitting in the wheelchair was a____experience.I had never considered before how___it would be to use one.As soon as I sat down，my ____made the chair begin to roll.Its wheels were not____.Then I wondered where to put my____.It took me quite a while to get the metal footrest into____.I took my first uneasy look at what was to be my only means of____for several hours.For disabled people，“adopting a wheelchair” is not a temporary(临时的)____. I tried to find a____position and thought it might be restful，____kind of nice，to be___around for a while.Looking around，I____I would have to handle the thing myself！My hands started to ache as I____the heavy metal wheels.I came to know that controlling the____of the wheelchair was not going to be a(n)____task. My wheelchair experiment was soon____.It made a deep impression on me.A few hours of “disability” gave me only a taste of the____，both physical and mental，that disabled people must overcome.
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