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—Yes. Some of them are good and the film Transformers: The Last Knight, is excellent.
一金属容器置于绝缘板上,带电小球用绝缘细线悬挂于容器中,容器内的电场线分布如图所示.容器内表面为等势面,A,B为容器内表面上的两点,下列说法正确的是( )