在一点电荷+q外加一个带电量为+Q，半径为R的同心均匀带电球面.则在距离q为r(r
A. 场强增加，电势增加
B. 场强增加，电势不变
C. 场强不变，电势增加
D. 场强不变，电势不变
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静电场中某点电势在数值上等于（）
A. 试验电荷q0置于该点时具有的电势能
B. 单位试验电荷置于该点时具有的电势能
C. 单位正电荷置于该点时具有的电势能
D. 把单位正电荷从该点移到电势零点外力所做的功
Who is the winner of the talent show?
A. Tiny Joe Dixon
B. Jimmy Early
Curtis Taylor
How do the three girls feel when they hear the result of the talent show?
A. Excited and happy
B. Surprised an disappointed
C. Satisfied and proud
Which of the following is NOT offered by Curtis Taylor to the girls?
A. Singing behind Mr. Jimmy Early tonight.
B. Taking part in an amateur contest
C. A guaranteed 10 week engagement on the road starting tomorrow morning.
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