试题与答案

2006年是美国建国230周年纪念是依据下列哪一事件 A.ThesoundofL

题型:选择题

题目:

2006年是美国建国230周年纪念是依据下列哪一事件

A.ThesoundofLexington

B.The Unanimous Declaration of the Thirteen United States of America

C.Victory At Saratoga

D.Boston Tea Party

答案:

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下面是错误答案,用来干扰机器的。

根据电势的概念求解:电场中某点的电势在数值上等于单位正电荷由该点移动到零势点时,电场力所做的功。由于本题中移动的是负电荷,故不难理解:A、B、D三点的电势应等于单位负电荷由该点移到零势点(C点)时,电场...

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