题目

如图所示,两平行金属板A、B间为一匀强电场,A、B相距d=6cm,C、D为电场中的两点,且C、D 相距d1=4cm,CD连线和场强方向成60°角.已知电子从D点移到C点电场力做功为W=3.2×10-17J,求:1.匀强电场的场强E;2.A、B两点间的电势差UAB;3.若A板接地,D点电势φD为多少?  答案: 1.E=10000N/C2.Uab=600V3.Ud=-200V解析:略 Understanding the cultural habits of another nation, especially ____________ containing   as many different subcultures as the united states, is very difficult. A. one            B. that         C. some      D. the one
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